Dolomite
Chemical Formula	(CaMg)(CO3)2
Species	Carbonates
Crystal System	Trigonal
Mohs Scale	3-4
Specific Gravity	2.84-2.86
Color	White, gray to pink
Streak	White
Luster	Vitreous, Pearly
Refractive Index	n = 1.679 - 1.681 n = 1.500
Diaphaneity	Transparent, Translucent
Cleavage	PerfectOn .
Fracture	Sub-Conchoidal
Crystal Habit：Tabular crystals, often with curved faces, also columnar, stalactitic, granular, massive.
Geological Setting：An important sedimentary and metamorphic mineral, found as the principal mineral in dolostones and metadolostones, and as an important mineral in limestones and marbles where calcite is the principal mineral present. Also found as a hydrothermal vein mineral, forming crystals in cavities; and found in serpentinites and similar rocks.