Chromian Antigorite

Chromian Antigorite is a chromium (Cr) a rich variety of Antigorite, a member regarding the Serpentine Group of minerals that features Antigorite, Bowenite, Lizardite and Williamsite. Chromian Antigorite is colored lavender to purple that is deep its chromium content. It is typically opaque, massive material that makes for very attractive mineral specimens. Faceted gems are additionally very attractive but rare. The one supply for Chromian Antigorite is the Wood’s Chrome Mine, minimal Britain Township, State Line Chromite District, Lancaster County, Pennsylvania, United States Of America.

Chemical Formula: (Mg;Fe2+)3Si2O5(OH)4 + Cr
Magnesium Iron Silicate Hydroxide + Chromium

 

Color: Green, Grey, Bluish grey, Brown, Black.
Density: 2.5 – 2.6
Hardness: 3.5-4
Luster: Vitreous – Greasy
Fracture: Brittle
Optical Properties: Biaxial (-)
Transparency: Translucent to Subopaque
Cleavage: {001} Good