Ruby Zoisite

Physical Properties

Hardness: 6-7 (Zoisite) and 9 (Ruby); Color: Green with magenta/red inclusions and black spots; Luster: Vitreous to pearly; Crystal structure: Orthorhombic/Hexagonal; SG: 3.35

Formation & Geological History

Formed through the regional metamorphism of basic igneous rocks and aluminous sediments; primarily found in Neoproterozoic metamorphic rocks about 600 million years old.

Uses & Applications

Mostly used for 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. It is unique because it features the stark contrast of opaque red ruby embedded in a green zoisite matrix.

Field Identification & Locations

Identify by the signature combination of emerald-green zoisite, magenta-red ruby patches, and black hornblende. Found almost exclusively in Tanzania (Longido district).

Identified on: 5/9/2026

Mode: Standard