solutionbg

Aragonite

Aragonite

Release time:22 August 2019
Aragonite

Type
Mineral

Mineral Classification
Carbonate

Chemical Formula
CaCO3

Streak
White

Mohs Hardness
3.5-4

Crystal System
Orthorhombic

Color
White, red, yellow, orange, green, purple, grey, blue and brown

Luster
Vitreous, resinous on fracture surfaces

Fracture
Subconchoidal

Description

Aragonite is a carbonate mineral, one of the two common, naturally occurring polymorphs of calcium carbonate, CaCO3. The other polymorph is the mineral calcite. Aragonite’s crystal lattice differs from that of calcite, resulting in a different crystal shape, an orthorhombic system with acicular crystals. Repeated twinning results in pseudo-hexagonal forms.

Related cases