mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
AI-generated identification · may be incorrectHardness of 6.5 to 7.5 on the Mohs scale, deep red to brownish-red color, vitreous to sub-adamantine luster, isometric crystal system with dodecahedral habits.
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Physical properties
Hardness of 6.5 to 7.5 on the Mohs scale, deep red to brownish-red color, vitreous to sub-adamantine luster, isometric crystal system with dodecahedral habits.
Formation & geological history
Forms in metamorphic rocks like schist and gneiss through regional metamorphism of aluminum-rich sedimentary rocks.
Uses & applications
Used widely as an abrasive in waterjet cutting and sandblasting, as well as a gemstone in jewelry.
Geological facts
Almandine is the most common variety of garnet and was heavily favored as a gemstone during the Victorian era.
Field identification & locations
Identified by its distinct deep red color, high hardness, and isometric crystal form; found globally in metamorphic terranes and alluvial deposits.
