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MINERAL NAME, FORMULA | |
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Most commonly WHITE or CLEAR, but other colors are possible; EFFERVESCES (fizzes) IN DILUTE HCl acid; H=3. | CALCITE, CaCO3 |
| Most commonly WHITE, PINK, or GRAY; commonly in fine-grained granular masses; REACTS WEAKLY WITH HCl acid (slowly or only if sample is powdered); H=3-3.5. | DOLOMITE, CaMg(CO3)2 | |