mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
AI-generated identification · may be incorrectHardness of 6.5-7.5 on Mohs scale. Color ranges from dark red to brownish-black with vitreous to resinous luster and no true cleavage.
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Physical properties
Hardness of 6.5-7.5 on Mohs scale. Color ranges from dark red to brownish-black with vitreous to resinous luster and no true cleavage.
Formation & geological history
Formed through regional metamorphism of aluminum-rich sedimentary rocks under high temperature and pressure conditions.
Uses & applications
Used primarily as an abrasive in waterjet cutting and sandblasting, as well as a semi-precious gemstone in jewelry.
Geological facts
Almandine is the most common and widespread variety of garnet, often occurring as dodecahedral or trapezohedral crystals in metamorphic schist and gneiss.
Field identification & locations
Identify by its dark red-brown color, high hardness, and rounded isometric crystal habit. Found worldwide, particularly in India, Brazil, and the USA.
