mineral
Almandine Garnet
Fe3Al2(SiO4)3
AI-generated identification · may be incorrectHardness of 6.5 to 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 to 7.5 on the Mohs scale, deep red to brownish-black color, vitreous to resinous luster, and isometric crystal system.
Formation & geological history
Forms primarily in metamorphic rocks like schists and gneisses through regional metamorphism of aluminum-rich sedimentary rocks.
Uses & applications
Used widely as an abrasive in waterjet cutting, sandblasting, and as a semi-precious gemstone in jewelry.
Geological facts
Almandine is the most common and widespread variety of garnet, often occurring in rounded, dodecahedral crystals called crystal habits.
Field identification & locations
Identified by its distinct deep red color, high hardness, lack of cleavage, and often occurs as weathered out pebbles in stream beds.
