metamorphic
Ruby in Zoisite
Anyolite (Calcium Aluminum Silicate with Aluminum Oxide impurities)
Hardness: 6-7 (Zoisite) to 9 (Ruby); Color: Green with magenta/red inclusions and black hornblende; Luster: Vitreous to dull; Crystal structure: Orthorhombic and Hexagonal; Specific gravity: 3.35
- Hardness
- 6-7 (Zoisite) to 9 (Ruby)
- Color
- Green with magenta/red inclusions and black hornblende
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 (Zoisite) to 9 (Ruby); Color: Green with magenta/red inclusions and black hornblende; Luster: Vitreous to dull; Crystal structure: Orthorhombic and Hexagonal; Specific gravity: 3.35
Formation & geological history
Formed through the regional metamorphism of igneous rock, particularly found in Tanzania. It is approximately 600 million years old (Neoproterozoic).
Uses & applications
Primarily used for ornamental carvings, cabochons for jewelry, and as a popular specimen for gemstone collectors and metaphysical practitioners.
Geological facts
Also known as Anyolite, derived from the Maasai word 'anyoli' meaning green. It was first discovered in the Mundarara Mine in Tanzania in 1954.
Field identification & locations
Identify by the distinct contrast of lime green zoisite and purplish-red ruby crystals, often accompanied by black hornblende streaks. Locations: Primarily Tanzania.
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