Aragonite
Chemical Formula	CaCO3
Species	Carbonates
Crystal System	Orthorhombic
Mohs Scale	3-4
Specific Gravity	2.95
Color	White, red, yellow, orange, green , blue and brown
Streak	White
Luster	Vitreous, Resinous
Refractive Index	n = 1.529 - 1.530 n = 1.680 - 1.682 n = 1.685 - 1.686
Diaphaneity	Transparent, Translucent
Cleavage	Distinct/GoodOn distinct; On and very indistinct.
Fracture	Sub-Conchoidal
Crystal Habit：Pseudohexagonal, prismatic crystals, acicular, columnar, globular, reniform, pisolitic, coralloidal, stalactitic, internally banded
Geological Setting：As speleothemes in limestone caves; as pisolites, sinters and massive lamellar deposits at geysers and hot springs; as seafloor oolites; with siderite in iron deposits; with calcite and dolomite and other magnesium minerals in altered serpentinites, dunites and peridotites; and as a replacement mineral in various rock types and ore deposits, formed from low-temperature and pressure aqueous solutions.