metamorphic
Ruby in Zoisite
Anyolite (Ruby in Zoisite)
Hardness: 6-9 (Zoisite 6-7, Ruby 9); Color: Green (Zoisite), Pink/Red (Ruby), Black (Tschermakite); Luster: Vitreous to dull; Crystal structure: Orthorhombic/Trigonal; Specific Gravity: 3.35
- Hardness
- 6-9 (Zoisite 6-7, Ruby 9)
- Color
- Green (Zoisite), Pink/Red (Ruby), Black (Tschermakite)
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-9 (Zoisite 6-7, Ruby 9); Color: Green (Zoisite), Pink/Red (Ruby), Black (Tschermakite); Luster: Vitreous to dull; Crystal structure: Orthorhombic/Trigonal; Specific Gravity: 3.35
Formation & geological history
Formed through the regional metamorphism of igneous and sedimentary rocks. This specific combination is most famous from the Neoproterozoic Mozambique Belt (~600 million years old).
Uses & applications
Primarily used for decorative purposes, 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. The black spots often seen in the specimen are usually the mineral Tschermakite (a hornblende).
Field identification & locations
Look for the distinct contrast between vibrant green zoisite and magenta-red ruby inclusions. Almost exclusively found in the Longido mining district of Tanzania.
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