Anyolite
_(Neoproterozoic;_Mundarara_Mine,_about_27_km_west_of_Longido,_Tanzania)_2_(49144140952).jpg){kind=link}
Anyolite is a metamorphic rock composed of intergrown green zoisite, black/dark green pargasite and ruby.[1] It has been found in the Arusha Region of Tanzania and in Austria.[1] It is sometimes incorrectly advertised as a variety of the mineral zoisite. The term anyolite is, however, not an officially accepted term for a metamorphic rock.[2] Its name derives from the Maasai word anyoli, meaning "green".[1] Anyolite is also referred to as ruby in zoisite, ruby zoisite, ruby-zoisite or Tanganyika artstone.
The contrasting colours make anyolite a popular material for sculptures and other decorative objects. It was first discovered at the Mundarara Mine, near Longido, Tanzania in 1954.
In 2010 it was suggested that a 2 kilogram stone known as the Gem of Tanzania owned by the defunct company Wrekin Construction and fraudulently valued at £11 million was actually a lump of anyolite worth about £100,[3] although it was eventually sold for £8000.[4] It is reported that the stone originally came from a mine near Arusha, Tanzania.[5]
References
[edit | edit source]- ^ a b c http://www.mindat.org/min-27151.html Mindat
- ^ Metamorphic rocks, A classification and glossary of terms, D. Fettes and J. Desmons ed., Cambridge University Press
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External links
[edit | edit source]- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
