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Selenite
Chemical Formula	CaSO4·2H2O
Species	Sulfates
Crystal System	Monoclinic
Mohs Scale	1.5-2
Specific Gravity	2.31-2.33
Color	Colourless, light tints due to included matter
Luster	Vitreous
Diaphaneity	Transparent
Fracture	Micaceous

Substances containing selenium

• A selenium-containing anion or ionic compound with the SeO₃^2? anion:
  • Selenite (ion)
  • Selenous acid
  • Silver selenite
  • Sodium selenite
• Selenite broth, an enrichment medium for the isolation of Salmonella species

Other

• Selenite (mineral), a variety of gypsum (CaSO₄·2H₂O)
• Selenites is a synonym of Zophos, a genus of land snails in the family Haplotrematidae.
• Selenite Range, a mountain range in Pershing County, Nevada
• Selenite, a fictional native inhabitant of the Moon; see Selene and The First Men in the Moon
• Selenitic Age, a fictional place in the game Myst