mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
AI-generated identification · may be incorrectHardness of 6.5-7.5 on the Mohs scale, deep red to brownish-black color, vitreous to resinous luster, and isometric crystal system.
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Physical properties
Hardness of 6.5-7.5 on the Mohs scale, deep red to brownish-black color, vitreous to resinous luster, and isometric crystal system.
Formation & geological history
Formed through regional metamorphism of aluminum-rich sedimentary rocks under high temperature and pressure conditions.
Uses & applications
Used primarily as a gemstone in jewelry and as an abrasive in waterjet cutting and sandblasting.
Geological facts
Almandine is the most common garnet species and often forms distinct dodecahedron or trapezohedron crystals in schist.
Field identification & locations
Identified by its dark red-brown color, high hardness, conchoidal fracture, and lack of cleavage. Commonly found in metamorphic schists and gneisses worldwide.
