Anyolite (Ruby in Zoisite)

Physical Properties

Hardness: 6-7 (Zoisite) to 9 (Ruby spots); Color: Bright green with black speckles (Hornblende); Luster: Vitreous to pearly; Crystal structure: Orthorhombic; Specific gravity: 3.35

Formation & Geological History

Formed through regional metamorphism of igneous rock. Most specimens originate from the Mundarara Mine in Tanzania, dated to the Neoproterozoic Era.

Uses & Applications

Primarily used for lapidary work including ornamental carvings, cabochons for jewelry, and as a popular specimen for mineral collectors.

Geological Facts

The name 'Anyolite' is derived from the Maasai word 'anyoli', which means green. It is a unique combination of minerals found together in a single rock matrix.

Field Identification & Locations

Identify by its distinctive combination of vivid green zoisite and black pargasite/hornblende. It is almost exclusively found in Tanzania, making location a key identifier.

Identified on: 4/23/2026

Mode: Standard