metamorphic
Anyolite
Ruby in Zoisite (Zoisite with Corundum)
Hardness: 6-9 (Zoisite is 6-7, Ruby is 9); Color: Green zoisite with pink/red ruby inclusions; Luster: Vitreous; Crystal Structure: Orthorhombic and Hexagonal; Specific Gravity: 3.2-3.5.
- Hardness
- 6-9 (Zoisite is 6-7, Ruby is 9)
- Color
- Green zoisite with pink/red ruby inclusions
- Luster
- Vitreous
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Physical properties
Hardness: 6-9 (Zoisite is 6-7, Ruby is 9); Color: Green zoisite with pink/red ruby inclusions; Luster: Vitreous; Crystal Structure: Orthorhombic and Hexagonal; Specific Gravity: 3.2-3.5.
Formation & geological history
Formed under high-pressure metamorphic conditions when magma interacts with limestone or other calcium-rich rocks. It is primarily found in Tanzania and dates back to the Neoproterozoic era.
Uses & applications
Used extensively in jewelry for cabochons, carvings, and ornamental sculptures; also popular among crystal collectors for its contrasting colors.
Geological facts
The name 'Anyolite' is derived from the Maasai word 'anyoli', which means green. It was first discovered in 1954 near the Longido mining district in Tanzania.
Field identification & locations
Identified by the distinct contrast of bright green zoisite and magenta-red ruby. Collectors should look for vibrant color contrast and black hornblende inclusions which are often present.
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