Friday, November 16, 2012

Gemstone of the Week: Friedelite

(Friedelite image found on

Friedelite was discovered in 1876 by Emile Bertrand and named for Charles Friedel, a French chemist and mineralogist.  (Charles Friedel worked with James Crafts to find a way to create synthetic diamonds.)   Friedelite is a hardness 4-5 and may be tan, brown, yellow, light pink, dark red, red-brown, or dark brown in colour.  It tends to have a vitreous luster and has a monoclinc crystal structure often with prsimatic development.  Friedelite is generally transparent to translucent and forms as either massives or in tabular form. Friedelite may be found in: South Africa, Australia, France, Sweden, and the states of New Jersey and Colorado.