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["actinolite","Ca2(Mg,Fe)5Si8O22(OH)2",5.0,6.0,2.9,3.2,"monoclinic","prismatic, radiating, fibrous","2 perfect","uneven","opaque","green,white,grey","vitreous","white",4,null]
["adamite","Zn2(AsO4)(OH)",3.5,3.5,4.3,4.5,"orthorhombic","small, many faceted prisms","2: 1 good, 1 poor","uneven","transparent","colorless,white,yellow,green","vitreous","white",1,null]
["aegirite","NaFe(Si2O6)",6.0,6.5,3.4,3.5,"monoclinic","striated prisms, fibrous","prismatic, distinct","uneven","opaque","brown,black,green","vitreous,resinous","yellow,green",3,null]
["albite","NaAlSi3O8",6.0,6.5,2.6,2.6,"triclinic","tabular, often massive","3: 2 good, 1 poor","uneven","transparent,translucent,opaque","white,grey,colorless","vitreous,pearly","white",4,null]
["allanite","(Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH)",5.5,6.0,3.5,4.2,"monoclinic","tabular, prismatic","poor","uneven","opaque","black,brown","vitreous","grey,green,brown",1,null]
["alunite","KAl3(SO4)2(OH)6",3.5,4.0,2.6,2.8,"hexagonal","rhombohedral, massive, earthy","basal, good","conchoidal","opaque","white,grey,red","vitreous","white",2,null]
["amblygonite","(Li,Na)Al(PO4)(F,OH)",5.5,6.0,3.1,3.1,"triclinic","rough crystals; compact or cleavable masses","4: 3 good, 1 perfect","uneven","transparent,translucent","white,yellow,pink,green,blue","vitreous,pearly","white",3,null]
["anaclime","NaAlSi2O6ù2H2O",5.0,5.5,2.2,2.3,"cubic","earthy or radiating granular aggregates","0 none","uneven","transparent,translucent","colorless,white,pink,yellow","vitreous","white",4,null]
["anatase","TiO2",5.5,6.0,3.8,3.9,"tetragonal","pyramids or tabular","perfect basal","uneven","transparent,translucent,opaque","brown,black,blue,red","adamantine","white,yellow",1,null]
["andalusite","Al2SiO5",7.0,7.5,3.1,3.3,"orthorhombic","granular,massive,usually square cross section","2 good at 90ø","uneven","opaque,translucent","white,pink,brown,grey","vitreous","white",3,null]
["andesine","NaAlSi3O8",6.0,6.0,2.6,2.6,"triclinic","commonly massive","3: 2 good at 90ø, 1 poor","uneven","opaque","white,colorless,grey","vitreous,pearly","white",3,null]
["anglesite","PbSO4",2.5,3.0,6.4,6.4,"orthorhombic","prismatic, tabular, massive","2 good","conchoidal","transparent,translucent","colorless,white","adamantine","white",2,null]
["anhydrite","CaSO4",3.0,4.0,2.9,3.0,"orthorhombic","crystalline or massive","3 poor","uneven","transparent","colorless,white,blue,grey","vitreous","white,yellow-green",2,null]
["anorthite","(Na,Ca)AlSi3O8",6.0,6.5,2.7,2.7,"triclinic","prismatic or massive","3: 2 good at 90ø, 1poor","uneven","transparent,translucent,opaque","colorless,white,grey,green","vitreous","white",4,null]
["anthophyllite","(Mg,Fe)7Si8O22(OH)2",5.5,6.0,2.8,3.2,"orthorhombic","lamellar,fibrous needles, felted aggregates","1 perfect","uneven","translucent","grey,light green,light brown","vitreous","white",2,null]
["antimony","Sb",3.0,3.5,6.6,6.7,"hexagonal","pseudocubic, tabular, massive","1 perfect","uneven","opaque","grey white","metallic","grey",1,null]
["apatite","Ca5(F,Cl,OH)(PO4)3",5.0,5.0,3.2,3.2,"hexagonal","crystalline,massive,usually 6 sided crystals","1 poor","conchoidal","transparent,translucent,opaque","green,blue green,yellow,blue,pink","vitreous","white",4,null]
["apophyllite","KCa4Si8O2O(OH)ù8H2O",4.5,5.0,2.3,2.5,"tetragonal","prismatic, foliated, massive","1 perfect","uneven","transparent,translucent","white,tint","vitreous,pearly","white",2,null]
["aragonite","CaCO3",3.5,4.0,2.9,2.9,"orthorhombic","concretionary,stalactitic,fibrous,radiating","3: 1 good, 2 poor","uneven","transparent,translucent","colorless,white,yellow,reddish","vitreous","white",3,null]
["arfvedsonite","Na2-3(Fe,Mg,Al)5Si8O22(OH,F)2",6.0,6.0,3.5,3.5,"monoclinic","prismatic,tabular crystals;rodlike aggregates","2 perfect at 60ø & 120ø","uneven","opaque","green black","vitreous","blue,grey",3,null]
["argentite","Ag2S",2.0,2.5,7.0,7.3,"cubic","distorted, crystals, massive","0 none","conchoidal","transparent,opaque","colorless,white,yellow","vitreous","white,yellow",2,null]
["arsenic","As",3.0,4.0,5.6,5.9,"hexagonal","often granular or massive","1 perfect","uneven","opaque","white, dark grey","metallic","grey",1,null]
["arsenopyrite","FeAsS",5.5,6.0,5.9,6.2,"monoclinic","prismatic or massive","1 good","uneven","opaque","silver,grey","metallic","grey,black",2,null]
["atacamite","Cu2Cl(OH)3",3.0,3.5,3.8,3.8,"orthorhombic","prismatic, tabular, massive","1 perfect","conchoidal","transparent,translucent","green,g-black","adamantine,vitreous","green",2,null]
["augite","(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6",5.0,6.0,3.3,3.5,"monoclinic","usually prismatic","2 good at 90ø","uneven","opaque","black,green-black","vitreous","white,grey",4,null]
["autunite","Ca(UO2)2(PO4)2ù10-12H2O",2.0,2.5,3.1,3.1,"orthorhombic","pseudo tetragonal plates","1 perfect","uneven","translucent","yellow,yellow-green","pearly","yellow",2,null]
["axinite","Ca2(Fe,Mn)Al2(BO3)(Si4O12)(OH)",6.5,7.0,3.3,3.3,"triclinic","sharp blades or massive","1 good","conchoidal","transparent,translucent","brown,grey,blue,green","vitreous","white",3,null]
["azurite","Cu3(CO3)2(OH)2",3.5,4.0,3.7,3.9,"monoclinic","prismatic, tabular, massive","2 good","conchoidal","translucent,opaque","deep blue","vitreous","pale blue",3,null]
["barite","BaSO4",2.5,3.0,4.5,4.5,"orthorhombic","platy,tabular,massive,earthy,stalactic masses","3: 2 good at 80ø, 1 poor","uneven","transparent,translucent","colorless,white,yellow,red,green","vitreous","white",3,null]
["beryl","Be3Al2Si16O18",7.5,8.0,2.6,2.8,"hexagonal","6 or 12 sided prisms, massive","1 poor","conchoidal","transparent","blue,yellow,green,pink,white,colorless","vitreous","white",3,null]
["biotite","K(Mg,Fe)2(Al,Fe)Si3O10(OH,F)2",2.5,3.0,2.7,3.1,"monoclinic","tabular, foliated","1 perfect","uneven","transparent,translucent,opaque","brown,black,green","pearly","white",4,null]
["bismuth","Bi",2.0,2.5,9.7,9.8,"hexagonal","pseudocubic, foliated, massive","1 poor","earthy","opaque","silver white,pink-reddish","metallic","silver white",1,null]
["bismuthinite","Bi2S3",2.0,2.0,6.4,6.5,"orthorhombic","small needles, usually massive","1 poor","conchoidal","opaque","grey","metallic","dark grey",2,null]
["boracite","Mg3B7O13Cl",7.0,7.0,3.0,3.0,"cubic","cubes, octahedra, or massive","2: 1 poor, 1 good","conchoidal","translucent","colorless,white,yellow,green","vitreous","white",3,null]
["borax","Na2B4O7ù10H2O",2.0,2.5,1.7,1.7,"monoclinic","prismatic or massive","2: 1 poor, 1 good","conchoidal","transparent","colrless,white","vitreous","white",2,null]
["bornite","Cu5FeS4",3.0,3.0,4.9,5.3,"cubic","usually massive","0 none","conchoidal","opaque","brownish bronze,blue,purple","metallic","grey,black",2,null]
["bournonite","PbCuSbS3",2.5,3.0,5.5,5.9,"orthorhombic","often twins, crystals or massive","3: 1 good, 2 poor","conchoidal","opaque","grey,black","metallic","grey,black",2,null]
["brookite","à-TiO2",5.5,6.0,4.2,4.9,"orthorhombic","tabular,crystals","3: 2 good, 1 poor","uneven","transparent,translucent","yellow-brown,red,black","adamantine,metallic","white,yellow,brown",1,null]
["brucite","Mg(OH)2",2.5,2.5,2.4,2.4,"hexagonal","crystals,massive,fibrous","1 perfect","uneven","translucent","white,blue,green,grey","vitreous,pearly","white",2,null]
["calcite","CaCO3",3.0,3.0,2.7,2.7,"hexagonal","rhombohedra, prisms, massive","3 perfect at 75ø","conchoidal","transparent,translucent,opaque","colorless,white,tint","vitreous","white",4,null]
["carnallite","KMgCl3ù6H2O",3.0,3.0,1.6,1.6,"orthorhombic","usually massive or granular","0 none","conchoidal","transparent,translucent","white,pink","vitreous","white",2,null]
["carnotite","K2(UO2)2(VO4)2ù3H2O",1.0,1.0,4.7,5.0,"monoclinic","earthy or powdery aggregates","1 perfect","earthy","opaque","yellow","earthy","pale yellow",2,null]
["cassiterite","SnO2",6.0,7.0,6.8,7.1,"tetragonal","crystals, fibrous, massive","2 good","conchoidal","transparent,translucent,opaque","brown,br-black","adamantine","white,yellow,light brown",2,null]
["celestite","SrSO4",3.0,3.5,4.0,4.0,"orthorhombic","tabular, fibrous, granular","3: 1 perfect, 2 good","conchoidal","transparent,translucent","white","vitreous,pearly","white",3,null]
["cerussite","PbCO3",3.0,3.5,6.5,6.5,"orthorhombic","prismatic, granular, massive","2 good","conchoidal","transparent,translucent","white,grey","adamantine,vitreous","white",2,null]
["chabazite","Ca(Al2Si4)O12ù6H2O",4.0,5.0,2.1,2.2,"hexagonal","rhombohedral or massive","3 poor","uneven","transparent,translucent","colorless,white,pink,yellow,brown","vitreous","white",3,null]
["chalcanthite","CuSO4ù5H2O",2.5,2.5,2.1,2.3,"triclinic","flat crystals, also massive","0 none","conchoidal","translucent","blue","vitreous","pale blue",3,null]
["chalcocite","Cu2S",2.5,3.0,5.7,5.8,"orthorhombic","massive","1 poor","conchoidal","opaque","lead grey,black tarnish","metallic","dark grey",2,null]
["chalcopyrite","CuFeS2",3.5,4.0,4.1,4.3,"tetragonal","massive","1 poor","conchoidal","opaque","brassy yellow","metallic","green-black",4,null]
["chlorite","(Mg,Fe)6(AlSi3)O10(OH)8",2.0,2.5,2.6,3.3,"monoclinic","6 sided crystals,foliated,scales,compact,granular","1 perfect","earthy,scaly","transparent,translucent","green,black","vitreous,pearly","colorless",4,null]
["chondrodite","(Mg,Fe)3(SiO4)(OH,F)2",6.0,6.5,3.1,3.1,"monoclinic","usually round grains, massive aggregates","1 poor","uneven","translucent","yellow, red-brown","vitreous,resinous","white",3,null]
["chromite","FeCr2O4",5.5,5.5,4.5,4.8,"cubic","octahedral, usually massive","0 none","uneven","opaque","black,brown","metallic","brown",3,null]
["chrysoberyl","BeAl2O4",8.5,8.5,3.7,3.7,"orthorhombic","prismatic, tabular, stellate","3: 1 good, 2 poor","conchoidal","transparent","green,yellow-green,brown","vitreous","white",2,null]
["chrysocolla","(Cu,Al)2H2Si2O5(OH)4ùnH2O",2.0,4.0,2.0,2.2,"amorphous","botryoidal or earthy","0 none","conchoidal","translucent,opaque","blue green,blue,green","vitreous,earthy","white,green-white",3,null]
["cinnabar","HgS",2.0,2.5,8.0,8.2,"hexagonal","rhombohedra, tabular, massive","3 perfect","uneven","translucent,opaque","red,grey,brown","adamantine,metallic","red",2,null]
["clinozoisite","Ca2Al3Si3O12(OH)",6.5,6.5,3.3,3.5,"monoclinic","elongated crystals,striated;rodlike aggregates","1 perfect","uneven","transparent,translucent","grey-white,pale green,pink","vitreous","white",3,null]
["cobaltite","CoAsS",5.5,5.5,6.0,6.3,"cubic","cube, pyritohedron, usually massive","1 perfect","conchoidal","translucent","silver,reddish","metallic","grey",2,null]
["colemanite","Ca2B6O11ù5H2O",4.0,4.5,2.4,2.4,"monoclinic","clear prismatic crystals; also granular or massive","2: 1 perfect, 1 good","uneven","transparent,translucent","white,pink,red","adamantine,vitreous","white",2,null]
["columbite","(Fe,Mn)(Nb,Ta)2O6",6.0,6.0,5.3,8.1,"orthorhombic","prismatic or tabular crystals;twins;massive","1 good","uneven","opaque","black,","metallic","black,dark red",2,null]
["copper","Cu",2.5,3.0,8.5,9.0,"cubic","octahedra, massive, arborescent","0 none","hackly","opaque","red,brown tarnish","metallic","red",1,null]
["cordierite","Mg2Al4Si5O18",7.0,7.5,2.6,2.7,"orthorhombic","pseudohexagonal, massive, granular","1 poor","uneven","transparent,translucent","blue,green,violet,yellow","vitreous,dull","white",2,null]
["corundum","Al2O3",9.0,9.0,3.9,4.1,"hexagonal","rhombohedral,also massive,crude 6-sided crystals","0 none","conchoidal","transparent,translucent,opaque","brown,pink,blue,white,green,red","adamantine,vitreous","white",3,null]
["covellite","CuS",1.5,2.0,4.6,4.6,"hexagonal","hex plates, usually massive","1 perfect","uneven","opaque","blue-black","resinous","black",2,null]
["cristobalite","SiO2",6.0,7.0,2.3,2.3,"cubic","octahedral","0 none","conchoidal","translucent","white,colorless","vitreous","white",1,null]
["crocoite","PbCrO4",2.5,3.0,5.9,6.1,"monoclinic","prismatic, granular","3: 1 good, 2 poor","conchoidal","translucent","red,orange","vitreous","orange yellow",1,null]
["cryolite","Na3AlF",2.5,3.0,2.9,2.9,"monoclinic","cuboidal crystals, usually massive","0 none","uneven","translucent","red,brown,colorless,white,black","vitreous,pearly","white",1,null]
["cuprite","Cu2O",3.5,4.0,5.8,6.1,"cubic","octahedral, massive, or earthy","0 none","conchoidal","translucent,opaque","red","adamantine","red-brown,shiny,yellow",2,null]
["danburite","CaB2Si2O8",7.0,7.3,2.9,3.0,"orthorhombic","clear prismatic crystals with wedge shaped ends","1 poor","uneven","transparent","colorless, pale yellow","vitreous","white",2,null]
["datolite","CaBSiO4(OH)",5.0,5.5,2.9,3.2,"monoclinic","prismatic, massive, granular","0 none","conchoidal","transparent,translucent","colorless,white,tint","vitreous","white",2,null]
["diamond","C",10.0,10.0,3.5,3.5,"cubic","cubes, octahedra, pebbles","4 perfect","conchoidal","transparent,translucent","colorless","adamantine","grey",1,null]
["diaspore","AlO(OH)",6.5,7.0,3.3,3.5,"orthorhombic","usually as stalactitic or foliated aggregates","0 none","earthy","transparent,translucent","pale pink,grey,green","*","white",2,null]
["diopside","CaMgSi2O6",5.0,6.0,3.2,3.4,"monoclinic","prismatic, massive, granular","2 good (87ø and 93ø)","uneven","transparent,translucent","colorless,green,black,grey,yellow","vitreous","white,grey",4,null]
["dioptase","CuSiO2(OH)2",5.0,5.0,3.2,3.3,"hexagonal","rhombohedral, also massive","3 perfect","conchoidal","transparent,translucent","emerald,green","vitreous","green",2,null]
["dolomite","CaMg(CO3)2",3.5,4.0,2.8,2.9,"hexagonal","rhombohedral, massive, granular","3 perfect at 74ø","conchoidal","transparent,translucent","white,tint","vitreous,pearly","white,grey",4,null]
["dumortierite","Al7(BO3)(SiO4)3O3",7.0,7.0,3.4,3.4,"orthorhombic","columnar or fibrous radiating aggregates","2: 1 good, 1 poor","uneven,hackly","translucent","blue,violet,red-brown","vitreous","white",2,null]
["enargite","Cu3AsS4",3.0,3.5,4.4,4.4,"otrho","usually massive or granular","3: 2 good, 1 poor","uneven","opaque","grey,black,steel","metallic","black",2,null]
["enstatite","Mg2Si2O6",5.5,6.0,3.2,3.9,"otrho","prismatic, also massive","2 good","uneven","translucent,opaque","grey,green,yellow,brown,black","vitreous,pearly","grey,white",4,null]
["epidote","Ca2(Al,Fe)3Si3O12(OH)",6.0,7.0,3.3,3.5,"monoclinic","elongated crystals, granular","1 perfect","uneven","translucent,opaque","yellow green,black green","vitreous","grey",3,null]
["epsomite","MgSO4ù7H2O",2.0,2.5,1.7,1.7,"orthorhombic","prismatic, usually massive, fibrous","2: 1 perfect, 1 good","conchoidal","transparent,translucent","colorless,white","vitreous","white",3,null]
["erythrite","Co3(AsO4)2ù8H2O",1.5,2.5,3.0,3.0,"monoclinic","radiating aggregates,earthy masses and crusts","1 perfect","earthy","transparent,translucent","red,grey","vitreous,pearly","red",1,null]
["euclase","BeAlSiO4(OH)",7.5,8.0,3.1,3.1,"monoclinic","prismatic","1 perfect","conchoidal","transparent,translucent","colorless,green,blue,yellow,white","vitreous","white",2,null]
["ferberite","FeWO4 - MnWO4",5.0,5.5,7.1,7.5,"monoclinic","prismatic, tabular, bladed, massive","1 perfect","uneven","translucent,opaque","red-brown,black","metallic,dull","dark brown",2,null]
["fluorite","CaF2",4.0,4.0,3.0,3.3,"cubic","cubes etc, also granular","4 perfect","conchoidal","transparent,translucent","purple,colorless,green,yellow,blue,red","vitreous","white",4,null]
["franklinite","(Zn,Mn,Fe)(Fe,Mn)2O4  *",6.0,6.5,5.0,5.2,"cubic","octahedral, granular, massive","0 none","uneven","opaque","steel black","metallic","black,brown,red brown",1,null]
["galena","PbS",2.5,2.5,7.2,7.6,"cubic","cube, octahedra, massive","3 perfect at 90ø","sub-conchoidal","opaque","grey","metallic","grey",4,null]
["garnet","A3B2(SiO4)3",6.0,8.0,3.4,4.2,"cubic","various beads,massive,crystals w/12 diamond faces","0 none","uneven","transparent,translucent,opaque","violet,red,yellow,green,black","resinous,vitreous","white",2,null]
["garnierite","(Ni,Mg)6Si4O10(OH)8",3.0,4.0,2.2,2.8,"amorphous","massive or earthy","0 none","earthy","opaque","white,green,blue","dull","green-white",3,null]
["glauberite","Na2Ca(SO4)2",2.5,3.0,2.8,2.8,"monoclinic","tabular,prismatic;compact masses and crusts","1 perfect","uneven","transparent,translucent","white,yellowish,red","vitreous,greasy","white",1,null]
["glauconite","(K,Na)(Al,Fe,Mg)2(Al,Si)4O10(OH)2  *",2.0,2.2,2.5,2.8,"monoclinic","amorphous, granular or earthy","0 none","earthy","translucent,opaque","blue green","dull,greasy","green",2,null]
["glaucophane","Na2(Mg,Fe)3Al2Si8O22(OH)2",6.0,6.5,3.0,3.3,"monoclinic","prisms, fibrous, granular, massive","2 perfect","uneven","translucent","blue,black,green","vitreous,pearly","blue-grey,white",2,null]
["goethite","FeO(OH)",5.0,5.5,4.0,4.4,"orthorhombic","prisms, tabular, massive, fibrous, earthy","1 perfect","uneven","translucent,opaque","brown,black,yellow,red","adamantine","brown,yellow",3,null]
["gold","Au",2.5,3.0,15.3,19.3,"cubic","cubes, usually massive, arborescent","0 none","hackly","opaque","yellow-gold","metallic","yellow",1,null]
["graphite","C",1.0,2.0,2.1,2.3,"hexagonal","usually scaly, massive, granular, earthy","1 perfect","uneven","opaque","black","metallic,dull","black",2,null]
["greenockite","CdS",3.0,3.5,4.9,5.0,"hexagonal","hemimorphic crystals, crusts","1 good","conchoidal","translucent","yellow,y-orange","adamantine,resinous","red,orange",1,null]
["gypsum","CaSO4ù2H2O",1.5,2.0,2.3,2.3,"monoclinic","prisms, stellate, granular, fibrous","3 1 perfect, 2 good","conchoidal","transparent,translucent","colorless,white,grey,yellow","pearly","white",4,null]
["halite","NaCl",2.0,2.5,2.2,2.2,"cubic","cubes, octahedra, massive, granular","3 perfect at right angles","conchoidal","transparent,translucent","colorless,white,tint","vitreous","white",4,null]
["harmotome","(Ba,K)(Al,Si)2Si6O16ù6H20",4.0,4.5,2.3,2.5,"monoclinic","always cruciform twins","1 poor","uneven","translucent","white,grey,yellow,red","vitreous","white",2,null]
["hausmannite","Mn2O4  *",5.5,5.5,4.7,4.8,"tetragonal","pyramidal, massive, granular","1 good","uneven","translucent,opaque","grey,blue,brown-black","metallic,vitreous","brown",1,null]
["hauyne","(Na,Ca)4-8(Al6Si6)O24(SO4,S)1-2",5.5,6.0,2.3,2.4,"cubic","crystal beads, granular","3 perfect","conchoidal","transparent,translucent","blue,grey,green,red,yellow","vitreous,resinous","white,pale blue",2,null]
["hematite","Fe2O3",5.5,6.5,5.2,5.3,"hexagonal","massive,earthy,rhombohddedral,scaly or fibrous","0 none","uneven","opaque","tin,steel,red","metallic,earthy","red,red-brown",4,null]
["hemimorphite","Zn4Si2O7(OH)2ùH2O",4.5,5.0,3.3,3.5,"orthorhombic","hemimorphic, massive, granular crusts","1 perfect","uneven","transparent,translucent,opaque","white,yellow,brown,green","vitreous","white",2,null]
["heulandite","(Na,Ca)4-6Al6(Al,Si)4Si26O72ù24H2O",3.5,4.0,2.2,2.2,"monoclinic","tabular, globular masses","1 perfect","uneven","transparent,translucent","white,red,brown","vitreous,pearly","white",3,null]
["hornblende","(Ca,Na)2-3(Mg,Fe,Al)5(Al,Si)8O22(OH)2 *",5.0,6.0,2.9,3.4,"monoclinic","prismatic, bladed, fibrous, massive, granular","2 perfect (56ø & 124ø)","uneven","opaque","black,green,brown-black","vitreous","pale: grey,green,brown-black",4,null]
["hydrozincite","Zn5(CO3)2(OH)6",2.0,2.5,3.6,3.8,"monoclinic","usually massive, fibrous, crusts","1 perfect","uneven","opaque","colorless,white,pale yellow","dull,silky","white",1,null]
["ilmenite","FeTiO3",5.0,6.0,4.5,5.0,"hexagonal","very flat,tabular crystals;compact,granular aggrg.","0 none","conchoidal","opaque","black,dark brown","sub metallic","black,brown-red",1,null]
["iron","Fe",4.0,5.0,7.3,7.9,"cubic","usually scales, plates, grains","3 perfect","hackly","opaque","steel grey,black","metallic","grey",1,null]
["jadeite","Na(Al,Fe+3)Si2O6",6.5,7.0,3.2,3.5,"monoclinic","usually massive (jade)","2 good (87ø and 93ø)","splintery","translucent,opaque","green,white,pale violet","vitreous,pearly","white",1,null]
["jasper","SiO2",7.0,7.0,2.5,2.6,"hexagonal","cryptocrystalline silica","0 none","conchoidal","opaque","red,brown,yellow,green,blue,black","dull","white",1,null]
["kaolinite","Al2Si2O5(OH)4",2.0,2.5,2.6,2.6,"triclinic","earthy","1 perfect","conchoidal","opaque","white,grey,yellow","dull","white",4,null]
["kernite","Na2B4O7ù4H2O",2.5,2.5,1.9,1.9,"monoclinic","elongated,striated crystals;cleavable masses","3: 2 perfect, 1 good","splintery","translucent,opaque","colorless,white","vitreous,pearly","white",3,null]
["kyanite","Al2SiO5",5.0,7.0,3.5,3.7,"triclinic","prismatic, bladed","2: 1 perfect, 1 good","splintery","transparent,translucent,opaque","blue,white","pearly","white",3,null]
["labradorite","(Na,Ca)AlSi3O8",6.0,6.0,2.7,2.7,"triclinic","tabular, usually massive","3: 2 good, 1 poor","conchoidal","translucent,opaque","grey-brown","vitreous","white",4,null]
["laumontite","Ca(Al2Si4)O12ù4H2O",3.5,4.0,2.2,2.4,"monoclinic","prismatic, fibrous, columnar","2 perfect","uneven","transparent,translucent","white,red,yellow,blue","vitreous,pearly","white",4,null]
["lazulite","MgAl2(PO4)2(OH)2",5.0,6.0,3.0,3.1,"monoclinic","pyramidal, massive, granular","1 good","uneven","translucent,opaque","blue","vitreous","white",1,null]
["lazurite","(Na,Ca)8(Al,Si)12O24(S,SO4)",5.0,5.3,2.4,2.4,"cubic","compact,massive","6 poor","uneven","translucent","blue,blue green","vitreous","white,light blue",1,null]
["lepidolite","K(Li,Al)3(Si,Al)4O10(F,OH)2",2.5,4.0,2.8,2.9,"monoclinic","usually scaly or granular masses","1 perfect","uneven","translucent","red,violet,white","pearly","white",3,null]
["leucite","KAlSi2O6",5.5,6.0,2.4,2.6,"cubic","cubic form, tetra properties","0 none","conchoidal","translucent,opaque","white,grey,colorless","vitreous,resinous","white",4,null]
["magnesite","MgCo3",3.5,4.0,3.0,3.0,"hexagonal","usually massive or fibrous","3 perfect","conchoidal","transparent,translucent,opaque","white,grey-white,yellow,brown","vitreous","white",3,null]
["magnetite","Fe3O4",5.5,6.5,5.0,5.2,"cubic","octahedra, massive, granular","4 poor","uneven","opaque","steel,brown-black","metallic,dull","black",4,null]
["malachite","Ci2(CO3)(OH)2",3.5,4.0,3.9,4.0,"monoclinic","usually fibrous masses, granular, earthy","1 perfect","conchoidal","transparent,translucent,opaque","green","silky,vitreous","pale green",3,null]
["manganite","MnO(OH)",4.0,4.0,4.2,4.4,"orthorhombic","prismatic, aggregates, columnar","1 perfect","uneven","translucent,opaque","steel grey,black","metallic,vitreous","dark,red-brown",2,null]
["marcasite","FeS2",6.0,6.5,4.8,4.9,"orthorhombic","tabular, aggregates, nodules","2 good","uneven","opaque","brassy yellow","metallic","grey black",3,null]
["margarite","CaAl2(Al2Si2))O10(OH)2",3.5,4.5,2.9,3.1,"monoclinic","foliated or lamellar aggregates","1 perfect","uneven","transparent,translucent","pale pink,white,grey","pearly","white",3,null]
["mercury","Hg",0.0,0.0,13.6,13.6,"..","liquid globules","0 none","none","opaque","silver","metallic",null,1,null]
["microline","KAlSi3O8",6.0,6.5,2.5,2.5,"triclinic","prismatic,granular,blocky","2 good at right angles","uneven","translucent,opaque","white,tint,green","vitreous","white",4,null]
["millerite","NiS",3.0,3.5,5.3,5.6,"hexagonal","needles, fibrous, massive","2 perfect","uneven","opaque","brassy yellow","metallic","green-black",1,null]
["mimetite","Pb5(AsO4)3Cl",3.5,3.5,7.0,7.3,"hexagonal","trigonal, botryoidal, crusts","0 none","uneven","translucent","pale yellow,brown,white","resinous","white",2,null]
["molybdenite","MoS2",1.0,1.5,4.7,4.8,"hexagonal","usually foliated, massive","1 perfect","uneven","opaque","steel grey,blue tint","metallic","grey black",2,null]
["monazite","(Ca,La,Nd,Th)PO4",5.0,5.5,4.8,5.3,"monoclinic","tabular, twins, massive, sandy","1 good","conchoidal","opaque","pale yellow,dark red-brown","resinous","white",3,null]
["muscovite","KAl2(AlSi3)O10(OH)2",2.0,2.5,2.8,3.0,"monoclinic","pseudohexagonal plates, massive","1 perfect","uneven","transparent,translucent","white,yellow,green,silverish","pearly","white",4,null]
["natrolite","Na2(Al2Si3)O10ù2H2O",5.0,5.5,2.2,2.4,"orthorhombic","prismatic, acicular, radial aggregates,","1 perfect","conchoidal","transparent,translucent","white,yellow,pink","vitreous,pearly","white",3,null]
["nephiline","(Na,K)AlSiO4",5.5,6.0,2.6,2.6,"hexagonal","prismatic, aggregates, massive","3 poor","conchoidal","transparent,translucent","white,colorless,pale grey","resinous,vitreous","white",4,null]
["niccolite","NiAs",5.0,5.5,7.3,7.8,"hexagonal","usually irregular masses, botryoidal","0 none","conchoidal","opaque","copper-red,grey,(black tarnish)","metallic","brown-black",2,null]
["oligoclase","(Na,Ca)AlSi3O8",6.0,6.5,2.6,2.6,"triclinic","platy,tabular,blocky,massive","1 perfect","conchoidal","translucent,opaque","white,green,red,grey,yellow","vitreous,pearly","white",4,null]
["olivine","(Mg,Fe)2SiO4",6.5,7.0,3.3,3.3,"orthorhombic","granular,prismatic, tabular","2 poor","conchoidal","transparent,translucent","green,yellow-green","vitreous","white",4,null]
["opal","SiO2ùnH2O",5.5,5.5,1.8,2.2,"amorphous","reniform, stalactitic, massive","0 none","conchoidal","translucent,opaque","colorless,white,yellow,red,blue,green","resinous,pearly","white",3,null]
["orpiment","As2S3",1.5,2.0,3.4,3.5,"monoclinic","prismatic, usually massive crusts","1 perfect","uneven","translucent","yellow","resinous,pearly","yellow",2,null]
["orthoclase","KAlSi3O8",6.0,6.0,2.5,2.6,"monoclinic","prismatic, tabular, granular masses","2 good at 90 ø","conchoidal","transparent,translucent,opaque","white,grey,tint","vitreous,pearly","white",3,null]
["pectolite","NaCa2Si3O8(OH)",5.0,5.0,2.8,2.9,"triclinic","fibrous or radiating spherical aggregates","2 perfect","splintery","translucent","white,grey","vitreous,silky","white",2,null]
["penninite","Mg3(Si4O10)(OH)2ùMg3(OH)6",2.5,2.5,2.6,2.8,"monoclinic","pseudohexagonal, massive","1 perfect","uneven","transparent,translucent","green,blue green","pearly","pale green",2,null]
["pentlandite","(Fe,Ni)9S8",3.0,3.5,4.6,5.0,"cubic","usually granular or massive","0 none","conchoidal","opaque","bronze-yellow","metallic","brown,black",2,null]
["petalite","LiAlSi4O10",6.0,6.5,2.4,2.4,"monoclinic","tabular or columnar crystals","1 perfect","uneven","transparent,translucent","white,grey,colorless","vitreous,pearly","white",3,null]
["phenakite","Be2SiO4",7.5,8.0,3.0,3.0,"orthorhombic","pseudohexagonal crystals","1 poor","conchoidal","transparent","colorless,pale-yellow,pink","vitreous","white",1,null]
["phillipsite","(K2,Na2Ca)(Al2Si4)O12ù4-5H2O",4.0,4.5,2.2,2.2,"monoclinic","prismatic cruciform twins, radial aggreg","1 perfect","uneven","translucent","white,yellow,grey,red","vitreous","white",3,null]
["phlogopite","K(Mg,Fe)3(AlSi3)O10(F,OH)2",2.5,3.0,2.8,2.8,"monoclinic","tabular, laminar, scales","1 perfect","uneven","transparent,translucent","colorless,brown,red,white","pearly","white",4,null]
["plagioclase","Na(AlSi3O8)",6.0,6.0,2.6,2.7,"triclinic","common rock forming mineral","3: 2 good at 90ø,1 poor","uneven","transparent,translucent","colorless,white,grey,green,blue,red","vitreous,pearly","white",4,null]
["platinum","Pt",4.0,4.5,21.5,21.5,"cubic","usually granular","0 none","hackly","opaque","steel grey,silver","metallic","silver grey",1,null]
["polybasite","(Ag,Cu)16SbS11",2.0,3.0,6.0,6.2,"monoclinic","tabular crystals,beveled edges,triangular growths","1 poor","uneven","opaque","steel grey,iron black","metallic","black",1,null]
["polyhalite","KaCa2Mg(SO4)4ù2H2O",3.0,3.5,2.8,2.8,"triclinic","prismatic, usually platy or fibrous","1 good","conchoidal","translucent","red,white,yellow,green","vitreous,resinous","white,pink",1,null]
["prehnite","Ca2Al2Si3O10(OH)2",6.0,6.5,2.8,3.0,"orthorhombic","hemimorphic tabular, radial aggregates","1 good","uneven","transparent,translucent","green,y-green,yellow,colorless,white","vitreous,pearly","white",3,null]
["proustite","Ag3AsS3",2.0,2.5,5.0,6.0,"hexagonal","hemimorphic, granular, usually massive","1 good","conchoidal","translucent","red","adamantine","red",1,null]
["psilomelane","BaMnO16(OH)4  *",5.0,6.0,3.7,4.7,"amorphous","massive, botryoidal, stalactilic","0 none","uneven","opaque","black,brown","metallic,dull","brown-black,shiny,yellow",2,null]
["purpurite","(Mn,Fe)PO4  *",4.0,4.5,3.3,3.3,"orthorhombic","prismatic or massive","1 good","uneven","opaque","purple","silky","purple,blue",1,null]
["pyragyrite","Ag3SbS3",2.5,3.0,5.9,5.9,"hexagonal","hemimorphic prisms, massive","1 good","conchoidal","translucent,opaque","dark,red,blue-grey,black","metallic,adamantine","red",1,null]
["pyrite","FeS2",6.0,6.5,5.0,5.2,"cubic","striated cubes, massive, nodular","0 none","conchoidal","opaque","brassy brown,yellow","metallic","green-black",4,null]
["pyrolusite","MnO2",2.0,2.5,4.8,4.8,"orthorhombic","usually fibrous, massive, earthy","2 perfect","uneven","opaque","steel,dark-grey,black","mettalic,submetallic","black",2,null]
["pyromorphite","Pb5(PO4)3Cl",3.5,4.0,6.5,7.1,"hexagonal","trigonal prisms, aggregates, crusts","0 none","uneven","translucent","green,yellow,brown,blue,red","resinous","white,yellow",3,null]
["pyrophyllite","A12Si4O10(OH)2",1.0,2.0,2.7,2.9,"orthorhombic","tabular, foliated, radial aggregates","1 perfect","uneven","translucent","white,green,grey,brown,yellow","pearly","white",2,null]
["pyrrhotite","FeS",3.5,4.5,4.6,4.6,"hexagonal","tabular, foliated, massive, granular","0 none","uneven","opaque","brassy brown,yellow","metallic","dark grey",3,null]
["quartz","à-SiO2",7.0,7.0,2.6,2.7,"hexagonal","prismatic,6 sided crystals,massive","0 none","conchoidal","transparent,translucent,opaque","colorless,white,blue,green,yellow,red","vitreous,resinous","white",4,null]
["realgar","AsS",1.5,2.0,3.5,3.6,"monoclinic","prisms, needles, massive, granular","1 good","conchoidal","translucent","red,orange","resinous,adamantine","red,orange",2,null]
["rhodocrosite","MnCO3",3.5,4.5,3.5,3.6,"hexagonal","usually massive, globular, crusts","3 perfect","uneven","translucent","pink,red,yellow,dark brown","vitreous,pearly","white,pink",3,null]
["rhodonite","(Mn,Fe,Mg)SiO3",5.5,6.5,3.4,3.6,"triclinic","large tabular crystals, massive","2 good","uneven","transparent,translucent,opaque","red,brown,green,yellow,black","vitreous","white",2,null]
["rutile","à-TiO2",6.0,6.5,4.4,4.3,"tetragonal","prisms, twins, massive, granular","3: 2 good, 1 poor","uneven","translucent,opaque","brown,black,red","metallic,adamantine","pale yellow,green",2,null]
["scapolite","(Na,Ca,K)4A13(Al,Si)3Si6O24(Cl,SO4,CO3)",5.0,6.0,2.5,2.8,"tetragonal","prismatic, massive, granular","2 good","conchoidal","translucent,opaque","white,yellow,pink","vitreous,pearly","white",3,null]
["scheelite","CaWO4",4.5,5.0,5.9,6.1,"tetragonal","pyramidal, granular, massive","3: 1 good, 2 poor","uneven","transparent,translucent","pale green,yellow","adamantine,resinous","white",2,null]
["scolecite","Ca(Al2Si3)O10ù3H2O",5.0,5.5,2.2,2.4,"monoclinic","prismatic, radiating, fibrous","1 good","uneven","transparent,translucent","white","vitreous,silky","white",3,null]
["scorodite","FeAsO4ù2H2O",3.5,4.0,3.3,3.3,"orthorhombic","pyramidal,tabular,prismatic","0 none","conchoidal","translucent","colorless,green,blue,brown,yellow","vitreous,adamantine","white",2,null]
["sepiolite","Mg4Si6O15(OH)2ù6H2O",2.0,2.5,2.0,2.0,"orthorhombic","compact, fine textured; sometimes earthy looking","0 none","conchoidal","opaque","white,yellowish","earthy","white",3,null]
["serpentine","Mg6(Si4O10)(OH)8",3.0,4.0,2.5,2.6,"monoclinic","massive, granular, foliated, fibrous","0 none","conchoidal","translucent,opaque","green,yellow,brown,black,red","resinous,dull","white",4,null]
["siderite","FeCO3",3.5,4.5,3.7,3.9,"hexagonal","rhombohedral, massive, granular","3 perfect","uneven","translucent,opaque","yellow,brown,bred,black","pearly,vitreous","white",4,null]
["sillimanite","A;2SiO5",6.0,7.0,3.2,3.2,"orthorhombic","acicular, massive, foliated, nodular","1 perfect","uneven","transparent,translucent","grey-green,grey-yellow,brown","vitreous","white",3,null]
["silver","Ag",2.5,3.0,9.6,12.0,"cubic","cube, usually massive arborescent","0 none","hackly","opaque","silver-white","metallic","brilliant silver",1,null]
["skutterudite","CoAs2-3",6.0,6.0,6.5,6.8,"cubic","small, cubic or octahedral metallic like crystals","2 good","uneven","opaque","tin white,silver grey","metallic","black",1,null]
["smithsonite","ZnCO3",5.0,5.5,4.0,4.5,"hexagonal","usually massive, granular, earthy","3 perfect","uneven","translucent,opaque","white,grey,green,brown","vitreous,pearly","white",3,null]
["sodalite","Na4Al3(SiO4)3Cl",5.0,6.0,2.2,2.4,"cubic","dodecahedral, massive","6 perfect","conchoidal","transparent,translucent","blue,colorless,grey,yellow,red","vitreous,resinous","white",3,null]
["sperrylite","PtAs2",6.0,7.0,10.6,10.6,"cubic","cubes, cube and octahedron","0 none","conchoidal","opaque","steel grey","metallic","black",1,null]
["sphalerite","(Zn,Fe)S",3.5,4.0,3.9,4.2,"cubic","massive cleavage pieces,crystals,rounded edges","6 perfect","conchoidal","transparent,translucent","pale yellow,brown,black,red,green","resinous","lt yellow,red brown",3,null]
["sphene","CaTiO(SiO4)",5.0,5.5,3.5,3.5,"monoclinic","wedge shapes, twins, massive","1 good","conchoidal","transparent,translucent,opaque","yellow,green,brown,black","adamantine,resinous","white",3,null]
["spinel","MgAl2O4",7.5,8.0,3.5,4.1,"cubic","octahedra, twins, granular","0 none","conchoidal","transparent,translucent,opaque","white,red,blue,green,brown,black","vitreous","white",3,null]
["spodumene","LiAlSi2O6",6.5,7.0,3.1,3.2,"monoclinic","8 sided prisms, massive","1 good","splintery","transparent,translucent","violet,pink,yellow,green","vitreous,pearly","white",3,null]
["staurolite","(Fe,Mg,Zn)2Al9Si4O23(OH)",7.0,7.5,3.7,3.8,"orthorhombic","6-sided prisms, often twins","1 poor","conchoidal","translucent,opaque","brown,black","vitreous,resinous","white,grey",3,null]
["stephanite","Ag5SbS4",2.0,2.5,6.3,6.3,"orthorhombic","massive,disseminated;prismatic,tabular crystals","2 good","sub-conchoidal","opaque","iron black","metallic","iron black",2,null]
["stibnite","Sb2S3",2.0,2.0,4.6,4.7,"orthorhombic","needles, radial aggregates, fibrous, massive","1 perfect","conchoidal","opaque","lead grey,black","metallic","grey black",3,null]
["stilbite","NaCa2(Al5Si13)O36ù14H2O",3.5,4.0,2.2,2.2,"monoclinic","tabular, twins, aggregates","1 perfect","uneven","transparent,translucent","colorless,white,yellow,brown,red","vitreous,pearly","white",3,null]
["strontianite","SrCO3",3.3,4.0,3.6,3.7,"orthorhombic","prismatic, needles, fibrous, granular","3 perfect","uneven","transparent,translucent","pale green,yellow,grey,white","vitreous,resinous","white",1,null]
["sulfur","S",2.0,2.0,1.9,2.1,"orthorhombic","bipyramids, granular, fibrous, nodular","2 poor","conchoidal","transparent,translucent","yellow,brown","resinous","pale yellow",2,null]
["sylvanite","AgAuTe4",1.5,2.0,8.0,8.3,"monoclinic","stubby,prismatic crystals;skeletal rock deposits","1 perfect","uneven","opaque","silver white","metallic","grey",1,null]
["sylvite","KCl",2.0,2.0,2.0,2.0,"cubic","cubic,octahedral crystals;compact,granular masses","1 perfect","uneven","transparent","red,white,colorless","vitreous","white",1,null]
["talc","Mg3Si4O10(OH)2",1.0,1.0,2.7,2.8,"monoclinic","usually granular, massive or scaly","1 perfect","uneven","transparent,translucent,opaque","green,grey,white","pearly","white",4,null]
["tetrahedrite","(Cu,Fe)12Sb4Si3 - (Cu,Fe)12As4S13",3.0,4.5,4.4,5.4,"cubic","tetrahedral, massive, granular","0 none","uneven","translucent,opaque","grey black","metallic","black,brown,red",2,null]
["thenardite","Na2SO4",2.5,3.0,2.7,2.7,"orthorhombic","clusters,granular,massive,tabular","1 perfect","uneven,hackly","transparent,translucent","white,brownish,grey","vitreous","white",2,null]
["topaz","Al2SiO4(F,OH)2",8.0,8.0,3.4,3.6,"orthorhombic","striated prisms or massive","1 perfect","uneven","transparent,translucent,opaque","colorless,yellow,pink,blue,green","vitreous","white",3,null]
["tourmaline","(Na,Ca)(Al,Fe,Li,Mg)3A16(BO3)3(Si6O18)*",7.0,7.5,3.0,3.2,"hexagonal","trigonal prisms, massive","0 none","uneven","transparent,translucent,opaque","brown,black,red,pink,green,blue,yellow","vitreous","white",3,null]
["tremolite","Ca2Mg5Si8O22(OH)2",5.5,6.0,2.9,3.1,"monoclinic","prisms, bladed, fibrous, massive","2 perfect","splintery","transparent,translucent","colorless,white,grey,green","vitreous","white",4,null]
["trydimite","á-SiO2",6.5,7.0,2.3,2.3,"hexagonal","plates, often twins","0 none","uneven","transparent,translucent","colorless,white","waxy","white",1,null]
["turquoise","CuAl6(PO4)4(OH)8ù5H2O",5.0,6.0,2.6,2.9,"triclinic","usually massive, stalactitic, crusts","0 none","conchoidal","translucent,opaque","blue,blue green,grey-green","waxy","white,pale green",2,null]
["ulexite","NaCaB5O9ù8H2O",1.0,2.0,2.0,2.0,"triclinic","light,spongy,rounded masses; fine fibers","2: 1 perfect, 1 good","uneven","transparent","white","silky","white",2,null]
["uraninite","UO2",5.5,5.5,10.9,10.9,"cubic","usually granular masses;cubic,dodecahedral crystal","0 none","conchoidal","opaque","steel black","sub metallic","brown-black",2,null]
["vanadinite","Pb5(VO4)3Cl",3.0,3.0,6.7,7.1,"hexagonal","trigonal pyramids, aggregates, crusts","0 none","uneven","transparent,translucent","red,brown,yellow","resinous","white,yellow",2,null]
["vesuvianite","Ca10(Mg,Fe)2Al4(SiO4)5(SiO7)2(OH)4",6.5,6.5,3.3,3.5,"tetragonal","prismatic, massive, granular","0 none","uneven","transparent,translucent","green-brown,red,yellow","vitreous","white",3,null]
["vivianite","Fe3(PO4)2ù8H2O",1.5,2.5,2.6,2.7,"monoclinic","small prisms, aggregates, crusts","1 perfect","splintery","transparent,translucent","blue,green,white,colorless","pearly,vitreous","pale blue",2,null]
["wavellite","Al3(PO4)2(OH)3ù5H2O",3.5,4.0,2.3,2.3,"orthorhombic","usually globular aggregates, crusts","3: 1 perfect, 2 good","uneven","translucent","white,green,brown,yellow","vitreous,pearly","white",1,null]
["willemite","Zn2SiO4",5.5,5.5,4.0,4.0,"hexagonal","compact,granular or massive","2 good","uneven","translucent","colorless,brown,red,yellow-brown,black","vitreous,resinous","white",1,null]
["witherite","BaCO3",3.5,3.5,4.3,4.4,"orthorhombic","prismatic twins, massive, granular","1 good","uneven","translucent","white,yellow,grey","vitreous,resinous","white",1,null]
["woolastonite","CaSiO3",4.5,5.0,2.8,2.9,"monoclinic","tabular, massive, lamellar","2 perfect","uneven","translucent","white,grey,yellow,brown","pearly,vitreous","white",2,null]
["wulfenite","PbMoO4",3.0,3.0,6.3,6.7,"tetragonal","massive,granular,various or flat tabular crystals","3 poor","uneven","transparent,translucent","yellow,red,orange","resinous,adamantine","white,pale yellow",2,null]
["zincite","(Zn,Mn)O",4.5,5.0,5.4,5.7,"hexagonal","massive, granular or foliated","1 perfect","conchoidal","transparent,translucent","red","adamantine","orange",1,null]
["zircon","ZrSiO4",7.0,7.5,3.9,4.8,"tetragonal","prisms and pyramid, small grains","2 poor","conchoidal","transparent,translucent,opaque","colorless,brown,grey,green,red","adamantine","white",3,null]
["zoisite","Ca2Al3(Si3O12)(OH)",6.0,6.5,3.3,3.4,"orthorhombic","long prisms, massive, fibrous","1 good","uneven","transparent,translucent","white,colorless,grey,green,brown,red","vitreous","white",1,null]