Ruby in Kyanite

Physical Properties

Hardness: 9 (Ruby)/4-7 (Kyanite); Color: Blue background with pink/red spots; Luster: Vitreous to pearly; Structure: Triclinic/Hexagonal; Cleavage: Perfect in one direction for Kyanite.

Formation & Geological History

Formed during regional metamorphism of aluminum-rich rocks. It is typically found in gneiss or schist formations under high-pressure conditions.

Uses & Applications

Used primarily for lapidary work, jewelry (beads, cabochons), and as a popular specimen for mineral collectors and metaphysical practitioners.

Geological Facts

Ruby and Kyanite are both aluminum-rich minerals. It is rare to find them together as they usually form at slightly different pressure-temperature ranges; when they do coexist, they create a striking color contrast.

Field Identification & Locations

Identify in the field by looking for distinct blue bladed crystals associated with red hexagonal or rounded crystalline inclusions. Common locations include India, Brazil, and parts of East Africa.

Identified on: 4/21/2026

Mode: Standard