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-black color, vitreous to subresinous luster, isometric crystal system, and distinct conchoidal fracture with no true cleavage.
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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 subresinous luster, isometric crystal system, and distinct conchoidal fracture with no true cleavage.
Formation & geological history
Forms primarily in metamorphic rocks like mica schists and gneisses through regional metamorphism of aluminum-rich argillaceous sediments.
Uses & applications
Widely used as a gemstone in jewelry and as an industrial abrasive in waterjet cutting and sandblasting.
Geological facts
Almandine is the most common and widely distributed member of the garnet group, often found in well-formed dodecahedral or trapezohedral crystals.
Field identification & locations
Identified by its high hardness, deep red-to-black color, and lack of cleavage; commonly sourced from India, Brazil, and the USA.
