metamorphic
Ruby Zoisite
Anyolite (Composition of Green Zoisite, Black Tschermakite, and Red Corundum)
Hardness: 6-7 (Zoisite) and 9 (Ruby); Color: Green with magenta/red inclusions and black spots; Luster: Vitreous to pearly; Crystal structure: Orthorhombic/Hexagonal; SG: 3.35
- Hardness
- 6-7 (Zoisite) and 9 (Ruby)
- Color
- Green with magenta/red inclusions and black spots
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6-7 (Zoisite) and 9 (Ruby); Color: Green with magenta/red inclusions and black spots; Luster: Vitreous to pearly; Crystal structure: Orthorhombic/Hexagonal; SG: 3.35
Formation & geological history
Formed through the regional metamorphism of basic igneous rocks and aluminous sediments; primarily found in Neoproterozoic metamorphic rocks about 600 million years old.
Uses & applications
Mostly used for ornamental carvings, cabochons for jewelry, and as a popular specimen for mineral collectors and metaphysical practitioners.
Geological facts
Also known as Anyolite, derived from the Maasai word 'anyoli' meaning green. It is unique because it features the stark contrast of opaque red ruby embedded in a green zoisite matrix.
Field identification & locations
Identify by the signature combination of emerald-green zoisite, magenta-red ruby patches, and black hornblende. Found almost exclusively in Tanzania (Longido district).
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