Mineralpedia Details for Wightmanite
Wightmanite
Wightmanite is named for Randall H. Wightman, the mining and exploration director at the Riverside Cement Company in Riverside, California, USA where Wightmanite also has its type locality. Found only in California, Wightmanite is a rare mineral that occurs only in contact metamorphosed limestone.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/wightmanite.pdf
- Formula
- Mg5O(BO3)(OH)5ยท2H2O
- Crystal System
- Monoclinic
- Cleavage
- Perfect, Distinct, None
- Luster
- Vitreous (Glassy)
- Color
- colorless, light green
- Streak
- white
- Class
- Monoclinic - Prismatic
- Hardness
- 5.5
- WebMineral
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Wightmanite from Commercial quarry, Crestmore, Riverside Co., California, United States
Slender long, fibrous crystals in marble matrix to over 1cm.
Click thumbnail images for larger view.
