metamorphic
Ruby in Zoisite
Anyolite (Zoisite with Corundum) Member of the Epidote Group
Hardness: 6-6.5 (Zoisite) to 9 (Ruby inclusions); Color: Green with black speckles and pink/red spots; Luster: Vitreous; Crystal Structure: Orthorhombic (Zoisite); Specific Gravity: 3.35
- Hardness
- 6-6
- Color
- Green with black speckles and pink/red spots
- Luster
- Vitreous
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Physical properties
Hardness: 6-6.5 (Zoisite) to 9 (Ruby inclusions); Color: Green with black speckles and pink/red spots; Luster: Vitreous; Crystal Structure: Orthorhombic (Zoisite); Specific Gravity: 3.35
Formation & geological history
Metamorphic formation where intense pressure and hydrothermal activity combine chromium-bearing green zoisite with red corundum (ruby) crystals, typically found in Precambrian metamorphic rocks.
Uses & applications
Primarily used for ornamental carvings, figurines, cabochons for jewelry, and as a popular specimen for crystal healing and mineral collectors.
Geological facts
Also known as Anyolite, derived from the Maasai word 'anyoli' meaning green. Large ruby crystals within the green zoisite matrix often show a black border of tschermakite hornblende.
Field identification & locations
Identify by the distinct green/pink/black color combination and extreme hardness of the red portions. Found almost exclusively in the Longido mining district of Tanzania.
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