gemstone
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-red color, vitreous luster, and isometric crystal system with no cleavage.
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Physical properties
Hardness of 6.5 to 7.5 on the Mohs scale, deep red to brownish-red color, vitreous luster, and isometric crystal system with no cleavage.
Formation & geological history
Forms in metamorphic rocks like schist and gneiss via regional metamorphism, as well as in igneous pegmatites.
Uses & applications
Primarily used as a gemstone in fine jewelry and in industrial abrasive applications like waterjet cutting.
Geological facts
Almandine is the most common garnet species and derives its name from Alabanda, an ancient Asian minor city where cut stones were traded.
Field identification & locations
Easily identified by its dark red color, high specific gravity, and distinct crystal habit or conchoidal fracture when broken.
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