M MineralystRock & Mineral Guide
Mineral

Selenite

Selenite — reference photo

Selenite is a mineral with the chemical formula CaSO4·2H2O. It has a Mohs hardness of 2 and vitreous to pearly luster.

Selenite properties

TypeMineral
Chemical formulaCaSO4·2H2O
Mohs hardness2
Luster vitreous to pearly
Typical colorsColorless, white, gray, yellow, green, or pink
FormationEvaporite deposits, commonly found in sedimentary environments
Rarity4 / 10

Mohs hardness 2 — very soft

1 · Talc5 · Apatite10 · Diamond
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