Gypsum

Overview

CaSO4·2(H2O)
Fluorescence: orange-yellow under SW and LW	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.3 g/cc
Hardness - Mohs	Gypsum - 2  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	white, colorless, brown, yellow
Streak	white

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	perfect
Tenacity	-
Fracture	fibrous
Luster	pearly

Similar Minerals

Dana Number : 29.06.03.01

Class: 29

Group: 29.06

Subgroup: 29.06.03 - gypsum

Dana Number	Mineral Name	Formula
29.06.03.01	gypsum	CaSO4·2(H2O)
29.06.03.01	selenite	Ca(SO4)·2(H2O)

Nickel-Strunz Number : 07.CD.40

Group : 07

Subgroup : CD

Nickel-Strunz Number	Mineral Name	Formula
07.CD.40	gypsum	CaSO4·2(H2O)
07.CD.40	selenite	Ca(SO4)·2(H2O)

Specimens

Localities

Uses