A magnesium sulfate mineral commonly found as an efflorescence on mine and cave walls. Epsomite was discovered at Epsom (Surrey England) in 1695 where it formed from the evaporation of mineral waters. The colorless or white salt often contains trace minerals, such as iron or calcium. Epsomite is purified and sold as Epsom salts for mineral baths.
Synonyms and Related Terms
Epsom salts; bitter salts;
Soluble in water. Orthorhombic crystals. Bitter to salty taste.
Fracture = conchoidal. Luster = vitreous to earthy. Streak = white
|Composition||MgSO4 - 7H2O|
|Mohs Hardness||2.0 - 2.5|
Mineralogy Database: Epsomite
Sources Checked for Data in Record
- Encyclopedia Britannica, http://www.britannica.com Comment: "epsomite" Encyclopædia Britannica [Accessed December 4, 2001](B/W photo)
- Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Epsomite (Accessed Sept. 7, 2005)
- Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998