M MineralystRock & Mineral Guide
Mineral

Aragonite

Aragonite — reference photo

Aragonite is a mineral with the chemical formula CaCO3. It has a Mohs hardness of 3.5-4 and vitreous to pearly luster.

Aragonite properties

TypeMineral
Chemical formulaCaCO3
Mohs hardness3.5-4
LusterVitreous to pearly
Typical colorsColorless, white, blue, green, yellow, brown
FormationFormed from the precipitation of calcium carbonate in marine environments, often in sedimentary rocks or as a product of biological processes.
Rarity4 / 10

Mohs hardness 3.5–4 — soft

1 · Talc5 · Apatite10 · Diamond
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