![Ruby in Zoisite (Anyolite (composite of Corundum [Al2O3] and Zoisite [Ca2Al3(SiO4)(Si2O7)O(OH)])) — metamorphic](https://media.rock.id/ruby-in-zoisite-9fe78588-c5fc-43f4-be20-acaba2620423-compressed.jpg)
metamorphic
Ruby in Zoisite
Anyolite (composite of Corundum [Al2O3] and Zoisite [Ca2Al3(SiO4)(Si2O7)O(OH)])
Hardness: 6-9 (Zoisite 6.5, Ruby 9); Color: Green matrix with red/pink inclusions and black spots (hornblende); Luster: Vitreous to pearly; Crystal structure: Orthorhombic (zoisite) and Trigonal (ruby)
- Hardness
- 6-9 (Zoisite 6
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6-9 (Zoisite 6.5, Ruby 9); Color: Green matrix with red/pink inclusions and black spots (hornblende); Luster: Vitreous to pearly; Crystal structure: Orthorhombic (zoisite) and Trigonal (ruby)
Formation & geological history
Formed through the regional metamorphism of igneous rocks rich in calcium and aluminum. Primarily found in Tanzania, with most deposits being billions of years old.
Uses & applications
Used widely in lapidary work for carvings, decorative items, tumbled stones, and bead jewelry.
Geological facts
Also known as Anyolite, derived from the Maasai word 'anyoli' meaning green. The contrasting colors of red and green make it a unique ornamental stone favored by sculptors.
Field identification & locations
Identify by the distinctive medium-to-dark green matrix containing opaque red corundum (ruby) crystals. Commonly found in the Mundarara Mine in Arusha, Tanzania.
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