mineral
Garnet
Silicate mineral group (e.g., Almandine, Fe3Al2(SiO4)3)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7.5, typically deep red to brown in color, vitreous to resinous luster, and crystallizes in the isometric system with no true cleavage.
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Physical properties
Mohs hardness of 6.5 to 7.5, typically deep red to brown in color, vitreous to resinous luster, and crystallizes in the isometric system with no true cleavage.
Formation & geological history
Forms primarily through regional and contact metamorphism of sedimentary protoliths under high temperature and pressure, as well as in igneous pegmatites.
Uses & applications
Used extensively as an abrasive in waterjet cutting and sandblasting, and 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 easily by its characteristic rounded 12-sided or 24-sided crystal habit and dark red color, commonly found in schist and gneiss host rocks.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Limonite
FeO(OH)•nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Limonite
FeO(OH)•nH2O
mineral
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous