Rocks and Minerals (O-Z)

Table Of Contents

Oligoclase Realgar Sulphates
Olivine Red Ochre Sulphides
Onyx Replacement Syenite
Opal Resinous Sylvanite
Orpiment Rhodochrosite Sylvite
Orthoclase Rhodocrosite Tachylite
Orthorhombic Rhodonite Tachylyte
Oxide Rhyolite Talc
Oxidized zone Ruby Tenacity
Pearly Rutile Tetragonal
Pectolite Sanidine Tetrahedrite
Pegmatite Sapphire Thenardite
Penninite Scapolite Till
Pentlandite Scheelite Tillite
Perlite Schist Topaz
Petalite Schorl Torbernite
Petroleum Schwazite Tourmaline
Phenakite Scolecite Trachyte
Phillipsite Scorodite Travertine
Phlogopite Secondary minerals Tremolite
Phosphates Sepiolite Triclinic
Pipe Serpentine Trydimite
Placer Shale Tufa
Plagioclase Siderite Tuff
Playa Silica Turquoise
Plutonic rock Silicates Twin
Polybasite Silky Ulexite
Polyhalite Sillimanite Umber
Potash Silver Uraninite
Potassium argon dating Skutterudite Vanadinite
Prase Slate Vein
Precipitation Smithsonite Vermilion
Prehnite Sodalite Vesicle
Proustite Specific gravity Vesuvianite
Pseudomorph Sperrylite Vitreous
Psilomelane Sphalerite Vivianite
Pumice Sphene Wavellite
Purpurite Spinel Willemite
Pyragyrite Spodumene Witherite
Pyrite Staurolite Woolastonite
Pyrolusite Stephanite Wulfenite
Pyromorphite Stibnite Ytterbite
Pyrope Stilbite Zincite
Pyrophyllite Strata Zircon
Pyroxenes Streak Zoisite
Pyrrhotite Striations
Quartz Strontianite