s
Russian Gemstones Encyclopedia

Vladimir Bukanov. Russian Gemstones Encyclopedia

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

XONOTLITE


XONOTLITE (Xonotlit—Xonotlite— сонотлит) (Rammelsberg, C.F. 1866), after its discovery location at Tetala de Xonotla, Mexico. Silicate – Ca6[(OH)2|Si6O17], subclass band silicate, monoclinic system. Hardness 6.5-7. Density 2.7. Glass luster. Cleavage in one direction. Viscous. Xonotlite is found in the form of veins, composed with massive, twisted-fibrous and radial-rayed aggregates. Color: white, gray and pale rose, sometimes with greenish tone. Non-transparent to translucent. It is formed in the process of contact metamorphism. In Russia, in the Noril’sk Region, at the Komsomol’skiy and Talnakh mines, they found significant accumulations of xonotlite, available for processing. In the north of the Chita Region, at the Chineiskiy titanium-manganese deposit they find xonotlite veins. They are linked with skarns in the zone of contact of the Chineiskiy gabbroid massif with carbonate rocks. Xonotlite is pale rose, half-transparent. The thickness of these veins is up to 0.5 m. and their length is more than 6 m. In the north of the Kamchatka Penin., at the Koryak Plateau, they discovered the Tamvatneiskoye deposit of ornamental xonotlite of white, light rose and brown-honey color. Xonotlite is discovered also on the Karginskiy Is. in the Bering Sea. In the Caucasus, xonotlite was found in Georgia, near Dedakanis Tskhali, Southern Osetia. In Azerbaijan, in the Lachinlar locality, it is found in serpentinites in the form of veins up to 15 cm. thick. Besides, its findings are known in the Kälbäcär locality., near Dzhamilli village. In the Northern Tadzhikistan, xonotlite was discovered at the Kansay deposit, near Khudjent. In South Africa, it forms fibrous aggregates up to 4 cm. at the N’Chwaning II mine, Northern Cape Prov. was extracted. In Japan, its findings on the Bosso Is. are known. In the U.S.A., xonotlite was discovered in California and Michigan, where it was called eakleite, or jurupaite. Besides. In Canada, xonotlite occur in rodingite bodies at the Jeffrey mine, Asbestos, Québec Prov. In Mexico, fine specimens are found in its original locality Tetela de Xonotla.

Synonyms. Calcium-pectolite | Eakleite (aekleite), after the Amer. mineralogist A.S. Eakle | Jurupaite, after the discovery location near Jurup, California, the U.S.A.

Cut Gems. Xonotlite is a new ornamental stone, well polished, displaying chatoyancy, with high hardness and viscosity resembling the same of nephrite. It is available for cut in cabochon and in stone-carving.

 

Search