Item talk:Q162425

Mindat Short Description

The most common sulphate mineral. Found as both massive material, including the alabaster variety; and clear crystals, the selenite variety; and, parallel fibrous, the satin spar variety. Typically colourless to white, transparent crystals, thick tabu...

Geoscience Ontology Status Notes

Mineral name has been known since antiquity and predates any formal descriptive publication

IMA Formula (from Mindat)

Ca(SO₄) · 2H₂O

RRUFF Formula (from Geoscience Ontology)

CaS⁶⁺O₄·2H₂O

Additional References

• http://www.handbookofmineralogy.com/pdfs/gypsum.pdf

• http://www.webmineral.com/data/Gypsum.shtml