Spessartine

specimen number:
9711744

location:
Nani Hill, Loliondo, Ngorongoro, Arusha, Tanzania

description:
A grouping of orange red lustrous translucent spessartine crystals with very little attached matrix. In good condition all around.

Nani Hill in the Loliondo division of the Ngorongoro District in Arusha, Tanzania, is not a formally scheduled commercial mine with fixed historical opening and closing dates, but rather a localized mineral occurrence that gained prominent attention during regional gem-prospecting rushes. Geologically, it is situated within the Mozambique Belt terrain of high-grade Proterozoic metamorphic rocks, characterized by a large quartz mass or vein system intersecting weathered schist and mica-rich host rocks. The site is internationally renowned among mineralogists for its manganese-rich metamorphic assemblage, which uniquely yields vivid orange spessartine garnets and rare orange kyanite associated with hematite and manganese oxides.

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