An overview on Xonotlite Jewelry and Gemstones. Covers details and essential information on the physical properties and characteristics of Xonotlite gems.
The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.
|Crystallography||Monoclinic: crystals acicular; usually massive, fibrous or compact.|
|Colors||Chalky white to colorless, pink, light to medium gray.|
|Luster||Greasy; pearly; dull vitreous.|
|Cleavage||Good in one direction; tough.|
|Stone Sizes||Translucent faceted stones (not truly transparent) up to several carats in size have been cut from Italian material. The material is strong, takes a good polish, and is extremely rare as both a species and as cut specimens.|
Optics: a=1.583; β=1.583; γ=1.593.
Occurrence: Typically as veinlets in serpentine or in contact zones. Small fragments may be translucent to transparent.
California; Michigan; Virginia; Puerto Rico.
Tetela de Xonotla, Mexico.
Laghi di Posina, Vicenza, Italy.
Name: After the Mexican locality.