metamorphic
Zoisite with Ruby or Rubellite in Fuchsite
Anyolite (K(Al,Cr)2(AlSi3O10)(OH)2 with (Ca2Al3(SiO4)(Si2O7)O(OH)))
Hardness: 6-7 (Zoisite) 9 (Ruby/Corundum); Color: Green with black inclusions (Hornblende) and white/red spots; Luster: Vitreous to pearly; Crystal structure: Orthorhombic
- Hardness
- 6-7 (Zoisite) 9 (Ruby/Corundum)
- Color
- Green with black inclusions (Hornblende) and white/red spots
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6-7 (Zoisite) 9 (Ruby/Corundum); Color: Green with black inclusions (Hornblende) and white/red spots; Luster: Vitreous to pearly; Crystal structure: Orthorhombic
Formation & geological history
Formed during regional metamorphism of magnesium-rich and aluminum-rich rocks. Most specimens are found in the Precambrian Neoproterozoic Mozambique Belt (around 600 million years old).
Uses & applications
Primarily used as an ornamental stone for carvings, beads, cabochons, and decorative obelisks or towers for collectors.
Geological facts
The name 'Anyolite' comes from the Maasai word 'anyoli', meaning green. It was first discovered in Tanzania in 1954. It is often confused with Ruby in Fuchsite, which is softer.
Field identification & locations
Identify by part-green zoisite and black pargasite inclusions. Most commonly found in Tanzania. Collectors should check for the presence of red corundum (ruby) which increases value.
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