mineral
Garnet
Almandine (Fe3Al2(SiO4)3)
AI-generated identification · may be incorrectHardness of 6.5 to 7.5 on the Mohs scale. Dark red to brownish-black color with a vitreous to resinous luster. Crystal structure is isometric, typically forming dodecahedron or trapezohedron shapes with no true cleavage.
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Physical properties
Hardness of 6.5 to 7.5 on the Mohs scale. Dark red to brownish-black color with a vitreous to resinous luster. Crystal structure is isometric, typically forming dodecahedron or trapezohedron shapes with no true cleavage.
Formation & geological history
Forms primarily in metamorphic rocks like schist and gneiss through regional metamorphism, as well as in igneous pegmatites.
Uses & applications
Widely used as an abrasive in waterjet cutting and sandblasting, as well as a semi-precious gemstone in jewelry.
Geological facts
Garnets have been used as gemstones since the Bronze Age and are the traditional birthstone for January.
Field identification & locations
Identified by its distinctive crystal habit, high hardness, and lack of cleavage; commonly found in metamorphic terrain worldwide.
