Labels:book | bulletin board | hakham | monitor | sky | web site OCR: CALCITE PROFILE Crystals are rhombohedral and sca lenohedral with combinations producing "nail head" and "dog -tooth forms Calcite rhombs show double refraction. Twinning common Calcite can also form in massive granular fibrous and stalactitic ha i bits. It 1 white colorless, gray, red brown. green and black The streak is white to grayish Calcite transparent translucent with vitreous (glass -like) to pearly or dull luster FORMATION Forms in many rocks. Calcite makes up the bulk of limes tones and marbles GALGITE transucent
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