mineral

Red Garnet

Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)

Hardness: 6.5-7.5 on Mohs scale. Color: Deep brownish-red to reddish-purple. Luster: Vitreous to resinous. Crystal structure: Isometric (dodecahedral). Cleavage: None. Specific gravity: 3.5-4.3.

Hardness: 6
Color: Deep brownish-red to reddish-purple
Luster: Vitreous to resinous

Identified March 18, 2026More mineral →

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Physical properties

Hardness: 6.5-7.5 on Mohs scale. Color: Deep brownish-red to reddish-purple. Luster: Vitreous to resinous. Crystal structure: Isometric (dodecahedral). Cleavage: None. Specific gravity: 3.5-4.3.

Formation & geological history

Typically forms in metamorphic rocks such as mica schists and gneisses during regional metamorphism, or in igneous rocks like pegmatites. Geological age ranges across all eras where high-pressure metamorphism occurred.

Uses & applications

Primarily used as a gemstone in jewelry (rings, necklaces) and industrially as an abrasive for sandblasting or waterjet cutting due to its hardness.

Geological facts

Garnet is the birthstone for January. Throughout history, it was believed to illuminate the night and protect travelers. The name comes from the Latin word 'granatus', meaning seed, due to its resemblance to pomegranate seeds.

Field identification & locations

Identify in the field by its characteristic dodecahedral crystal habit and dark red color. Found globally, with major deposits in India, Sri Lanka, Madagascar, and the USA (notably Arizona and Idaho). For collectors, look for high transparency and lack of inclusions.

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