Although anyolite is advertised as a variety of the mineral zoisite from Kenya and the Arusha Region of Tanzania, anyolite is actually a metamorphic rock composed of intergrown green zoisite, black tschermakite, and ruby.
The subspecies T. j. merumontanus can only be found on Mount Meru and the Arusha Region of Tanzania.
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The region's economy is based on the mining of Tanzanite gems on the Mererani Hills in north on the border with the Arusha Region.
Kaloleni, Tanzania, an administrative ward in the Arusha District of the Arusha Region of Tanzania
The School of St Jude, a charity-funded school for the poorest children of the Arusha Region, has a campus in Usa River.