mineral

Red Garnet

Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)

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

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

Identified March 15, 2026More mineral →

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Physical properties

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

Formation & geological history

Usually formed in metamorphic rocks like schist or gneiss through high pressure and temperature; can also be found in igneous rocks. Present in crustal rocks dating from the Precambrian to Cenozoic eras.

Uses & applications

Commonly used in jewelry as gemstones. Industrial uses include water-jet cutting abrasives, sandblasting, and water filtration media due to its hardness and chemical resistance.

Geological facts

Garnets were highly prized in ancient Rome and used as signet rings. They are the official birthstone for January and symbolize constancy and loyalty.

Field identification & locations

Identify in the field by its lack of cleavage, high hardness, and 'soccer ball' shaped 12-sided crystal habit. Frequently found in river sands or erode from schist outcrops. Common locations include India, Madagascar, and the United States (New York/Arizona).

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