Dolomite (pípè /ˈdɒləmaɪt/)
Quick facts General, Category ...
| Dolomite |
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 Dolomite |
| General |
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| Category | Carbonate mineral |
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| Chemical formula | CaMg(CO3)2 |
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| Identification |
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| Color | white, gray to pink |
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| Crystal habit | tabular crystals, often with curved faces, also columnar, stalactitic, granular, massive. |
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| Crystal system | trigonal - rhombohedral, bar3 |
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| Twinning | common as simple contact twins |
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| Cleavage | rhombohedral cleavage (3 planes) |
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| Fracture | brittle - conchoidal |
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| Mohs scale hardness | 3.5 to 4 |
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| Luster | vitreous to pearly |
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| Streak | white |
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| Specific gravity | 2.84–2.86 |
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| Optical properties | Uniaxial (-) |
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| Refractive index | nω = 1.679–1.681 nε = 1.500 |
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| Birefringence | δ = 0.179–0.181 |
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| Solubility | Poorly soluble in dilute HCl unless powdered. |
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| Other characteristics | May fluoresce white to pink under UV; triboluminescent. |
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| References | [1][2][3][4] |
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Dolomite from Morocco.
Dolomite.
