metamorphic
Zoisite with Ruby (Anyolite)
Anyolite (Calcium aluminium silicate hydroxide with Corundum)
Hardness: 6-6.5 (Zoisite) to 9 (Ruby); Color: Bright green with black and dark red inclusions; Luster: Vitreous to pearly; Crystal structure: Orthorhombic and Hexagonal
- Hardness
- 6-6
- Color
- Bright green with black and dark red inclusions
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6-6.5 (Zoisite) to 9 (Ruby); Color: Bright green with black and dark red inclusions; Luster: Vitreous to pearly; Crystal structure: Orthorhombic and Hexagonal
Formation & geological history
Formed via regional metamorphism of magnesium-rich and calcium-rich rocks. Most specimens are from Proterozoic aged deposits in Tanzania.
Uses & applications
Used primarily in jewelry as cabochons, ornamental carvings, and as a popular collector specimen.
Geological facts
The name 'Anyolite' is derived from the Maasai word 'anyoli', meaning green. It is unique for containing large, non-gem quality ruby crystals embedded in green zoisite.
Field identification & locations
Identify by the distinct contrast of bright green zoisite, black pargasite inclusions, and dark red/magenta ruby spots. It is almost exclusively found in Tanzania.
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