metamorphic

Ruby in Zoisite (Anyolite)

Ruby-Zoisite

AI-generated identification · may be incorrect

Hardness varies due to components (Ruby is 9, Zoisite is 6.5 on the Mohs scale); Color is a striking combination of green zoisite, black hornblende, and pink/red ruby crystals; Luster is vitreous to pearly; Crystal structure is orthorhombic (zoisite) and trigonal (ruby); Specific gravity is around 3.35 to 3.38.

Identified August 2, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed through metamorphic processes in high-grade metamorphic rocks and pegmatites, often found in Tanzania where the green zoisite matrix and red ruby crystals grow together under high pressure and temperature.

Uses & applications

Widely used in ornamental carvings, lapidary arts, beaded jewelry, and collected as a decorative specimen due to its unique color contrast.

Geological facts

Also known as Anyolite, this name is derived from the Maasai word 'anyoli,' meaning green. The stone was first discovered in the Longido mining district of northern Tanzania in 1954.

Field identification & locations

Easily identified by the distinct visual combination of opaque green zoisite speckled with vibrant pinkish-red corundum (ruby) and dark hornblende inclusions. Primarily sourced from Tanzania.