Rock Identifier
Red garnet cabochon pendant (Likely almandine garnet, iron-rich garnet-group silicate (often approximated as Fe₃Al₂(SiO₄)₃); identification from the image is uncertain.) — gemstone
gemstone

Red garnet cabochon pendant

Likely almandine garnet, iron-rich garnet-group silicate (often approximated as Fe₃Al₂(SiO₄)₃); identification from the image is uncertain.

AI-generated identification · may be incorrect

Small, dark-red, polished cabochon with a vitreous luster, set in jewelry. Garnet-group minerals have a cubic crystal system, no cleavage, Mohs hardness of about 6.5–7.5, and specific gravity around 3.5–4.3.

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Physical properties

Small, dark-red, polished cabochon with a vitreous luster, set in jewelry. Garnet-group minerals have a cubic crystal system, no cleavage, Mohs hardness of about 6.5–7.5, and specific gravity around 3.5–4.3.

Formation & geological history

Garnets commonly form during regional metamorphism of aluminum-rich rocks or in some igneous rocks; their ages vary with the host geology.

Uses & applications

Used in jewelry and, when not gem quality, as an industrial abrasive.

Geological facts

Garnet is a mineral group, not a single mineral; color and chemistry vary widely.

Field identification & locations

A red color alone cannot confirm garnet; hardness, refractive properties, and gemological testing help distinguish it from glass and other red stones. Garnets occur worldwide, including India, Sri Lanka, Madagascar, and the United States.