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MINERAL NAME, FORMULA | |
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Most commonly WHITE or CLEAR, but other colors are possible; 3-WAY CLEAVAGE, not at right angles; EFFERVESCES (fizzes) IN DILUTE HCl acid; H=3 | CALCITE,
CaCO3 |
| Most commonly WHITE, PINK, or GRAY; 3-WAY CLEAVAGE, not at right angles; commonly in fine-grained granular masses; REACTS WEAKLY WITH HCl acid (slowly or only if sample is powdered); H=3-3.5; may occur as curved, pink crystals. | DOLOMITE,
CaMg(CO3)2 |
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| COLORLESS, yellow, pale green or pale brown; PERFECT 1-WAY CLEAVAGE; thin flexible sheets; flakes in small grains; H=2.5. | MUSCOVITE,
KAl2(AlSi3)O10(OH)2 |
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