Ruby in Fuchsite

Corundum (Al2O3) in Chrome-Mica (KAl2(AlSi3O10)(OH)2)

Rock Type: metamorphic

Ruby in Fuchsite

Physical Properties

Hardness: 9.0 (Ruby) and 2.0-3.0 (Fuchsite); Color: Pink to red inclusions in a green to brownish-green matrix; Luster: Vitreous to pearly; Crystal structure: Trigonal (Ruby) and Monoclinic (Fuchsite); Specific Gravity: 2.8-4.0 (mixed).

Formation & Geological History

Formed through regional metamorphism. Often found in schist or gneiss where aluminum-rich solutions crystallize into corundum within a chromium-rich mica matrix. Most specimens are from the Precambrian era.

Uses & Applications

Primarily used for decorative carvings, lapidary arts like cabochons/beads, and by mineral collectors. It is also a popular specimen in metaphysical circles.

Geological Facts

While often confused with Ruby in Zoisite, 'Ruby in Fuchsite' can be distinguished by a blue-grey ring of Kyanite sometimes surrounding the rubies and its significantly lower hardness compared to Zoisite.

Field Identification & Locations

Identify by looking for pink/red hexagonal corundum crystals embedded in a soft, micaceous green/brown background. Common locations include India, Brazil, and parts of Russia.

Identified on: 4/29/2026

Mode: Standard