metamorphic
Ruby in Zoisite
Anyolite (Zoisite with Corundum)
Hardness: 6-7 (Zoisite matrix), 9 (Ruby inclusions); Color: Green matrix with pink/red spots and black hornblende; Luster: Vitreous; Crystal structure: Orthorhombic (Zoisite) and Hexagonal (Ruby); Specific gravity: 3.35
- Hardness
- 6-7 (Zoisite matrix), 9 (Ruby inclusions)
- Color
- Green matrix with pink/red spots and black hornblende
- Luster
- Vitreous
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Physical properties
Hardness: 6-7 (Zoisite matrix), 9 (Ruby inclusions); Color: Green matrix with pink/red spots and black hornblende; Luster: Vitreous; Crystal structure: Orthorhombic (Zoisite) and Hexagonal (Ruby); Specific gravity: 3.35
Formation & geological history
Formed through the regional metamorphism of mafic rocks or in hydrothermal veins, typically associated with Precambrian orogenic events.
Uses & applications
Primarily used as an ornamental stone for carvings, cabochons for jewelry, and as a popular specimen for crystal collectors.
Geological facts
Also known as Anyolite, a name derived from the Maasai word for green. It was first discovered in the Longido mining district in Tanzania in 1954.
Field identification & locations
Identify by the distinct contrast between the vibrant green zoisite and the magenta ruby crystals. Primarily found in Tanzania and Kenya. High density helps distinguish it from dyed imitations.
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