metamorphic

Ruby Zoisite

Anyolite (Calcium aluminium silicate with Chromium/Corundum inclusions)

AI-generated identification · may be incorrect

Hardness: 6-7 (Zoisite) and 9 (Ruby); Color: Green with black and red spots; Luster: Vitreous to pearly; Crystal structure: Orthorhombic/Trigonal; Specific gravity: 3.35

Hardness: 6-7 (Zoisite) and 9 (Ruby)
Color: Green with black and red spots
Luster: Vitreous to pearly

Identified June 9, 2026More metamorphic →

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Physical properties

Hardness: 6-7 (Zoisite) and 9 (Ruby); Color: Green with black and red spots; Luster: Vitreous to pearly; Crystal structure: Orthorhombic/Trigonal; Specific gravity: 3.35

Formation & geological history

Formed through the regional metamorphism of igneous and sedimentary rocks under high pressure and temperature. Found primarily in Tanzania.

Uses & applications

Used widely for ornamental carvings, polished cabochons, jewelry, and as a popular specimen for metaphysical collectors.

Geological facts

Also known as Anyolite, a name derived from the Maasai word for green. It is a natural combination of green zoisite, red ruby (corundum), and black tschermakite.

Field identification & locations

Identify by its unique green, red, and black mottled appearance. It is distinct because the ruby inclusions are often opaque and surrounded by black pargasite borders.