Rock Identifier
Garnet ring (Likely almandine or pyrope garnet, an Fe–Mg–Al silicate in the garnet group; exact identity cannot be confirmed visually) — gemstone
gemstone

Garnet ring

Likely almandine or pyrope garnet, an Fe–Mg–Al silicate in the garnet group; exact identity cannot be confirmed visually

AI-generated identification · may be incorrect

Faceted, deep red-to-purple transparent stones with vitreous luster, set in a gold-colored metal ring with small colorless accent stones. Garnet hardness is 6.5–7.5 Mohs, lacks cleavage, and has cubic crystal symmetry; specific gravity is typically 3.5–4.3.

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Physical properties

Faceted, deep red-to-purple transparent stones with vitreous luster, set in a gold-colored metal ring with small colorless accent stones. Garnet hardness is 6.5–7.5 Mohs, lacks cleavage, and has cubic crystal symmetry; specific gravity is typically 3.5–4.3.

Formation & geological history

Garnets crystallize mainly in metamorphic rocks such as schist and gneiss, although some form in igneous rocks. Their ages range from relatively young to Precambrian, depending on the deposit.

Uses & applications

Used as jewelry gemstones, abrasives, and collector specimens; the pictured material is a cut and mounted gemstone rather than a natural rock sample.

Geological facts

Red garnets are commonly almandine or pyrope, but color alone cannot distinguish species. Garnets are generally singly refractive and commonly show high brilliance when well cut.

Field identification & locations

Identify garnet by its red color, glassy luster, lack of cleavage, and hardness; a refractometer, specific-gravity test, or gemological analysis is needed for confirmation. Important sources include India, Sri Lanka, Madagascar, Mozambique, Tanzania, and the United States.