gemstone
Almandine Garnet
Iron aluminum silicate, Fe3Al2(SiO4)3
AI-generated identification · may be incorrectHardness of 7.5 to 8 on the Mohs scale, deep red to brownish-black color, vitreous to resinous luster, and isometric crystal system with dodecahedral habit.
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Physical properties
Hardness of 7.5 to 8 on the Mohs scale, deep red to brownish-black color, vitreous to resinous luster, and isometric crystal system with dodecahedral habit.
Formation & geological history
Forms primarily in metamorphic rocks like schists and gneisses through regional metamorphism, as well as in igneous pegmatites.
Uses & applications
Widely used in jewelry as a gemstone and utilized in industrial applications as an abrasive for waterjet cutting and sandblasting.
Geological facts
Almandine is the most common variety of garnet and derives its name from Alabanda, an ancient Turkish town where garnets were cut and traded.
Field identification & locations
Identified by its characteristic dark red color, high hardness, and distinct isometric crystal shape; commonly found worldwide in metamorphic terranes.
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