mineral
Garnet
Nesosilicate group (e.g., Almandine: Fe3Al2(SiO4)3)
AI-generated identification · may be incorrectHardness of 6.5-7.5 on the Mohs scale, deep red to dark brown color, vitreous to resinous luster, and isotropic crystal structure with no true cleavage.
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Physical properties
Hardness of 6.5-7.5 on the Mohs scale, deep red to dark brown color, vitreous to resinous luster, and isotropic crystal structure with no true cleavage.
Formation & geological history
Forms primarily in metamorphic rocks like schist and gneiss through regional or contact metamorphism under high temperature and pressure.
Uses & applications
Widely utilized as an abrasive in waterjet cutting, sandblasting, and as a popular gemstone in jewelry.
Geological facts
Garnets have been used as gemstones since the Bronze Age and sometimes occur in antique jewelry as dark red carbuncles.
Field identification & locations
Identified by its distinct isometric crystal habit, lack of cleavage, and high hardness; commonly found worldwide in metamorphic terranes and alluvial gravels.
