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.<ref name="auto">http://www.mindat.org/min-27151.html Mindat</ref> It has been found in the Arusha Region of Tanzania and in Austria.<ref name="auto"/> 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.<ref>Metamorphic rocks, A classification and glossary of terms, D. Fettes and J. Desmons ed., Cambridge University Press</ref> Its name derives from the Maasai word anyoli, meaning "green".<ref name="auto"/> 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,<ref name=FT11090>Template:Cite news</ref> although it was eventually sold for £8000.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> It is reported that the stone originally came from a mine near Arusha, Tanzania.<ref name=guthrie>Template:Cite news</ref>