mineral
Garnet
Nesosilicate group (e.g., Almandine: Fe3Al2(SiO4)3)
AI-generated identification · may be incorrectHardness of 6.5 to 7.5 on the Mohs scale, typically deep red to brown in color, vitreous to resinous luster, crystal structure is isometric (often dodecahedron or trapezohedron), conchoidal fracture with no true cleavage, and specific gravity ranging from 3.5 to 4.3.
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Physical properties
Hardness of 6.5 to 7.5 on the Mohs scale, typically deep red to brown in color, vitreous to resinous luster, crystal structure is isometric (often dodecahedron or trapezohedron), conchoidal fracture with no true cleavage, and specific gravity ranging from 3.5 to 4.3.
Formation & geological history
Formed primarily in metamorphic rocks such as schists and gneisses through regional or contact metamorphism, and occasionally in igneous rocks like granitic pegmatites and peridotites under high-temperature and high-pressure conditions.
Uses & applications
Widely used as an abrasive in waterjet cutting and sandblasting, as a semi-precious gemstone in jewelry, and occasionally in industrial filtration.
Geological facts
Garnets have been used as gemstones since the Bronze Age. The name comes from the Latin word 'granatus', meaning grain, likely referring to pomegranate seeds due to their similar appearance and shape.
Field identification & locations
Easily identified by its characteristic isometric crystal habit (rounded 12-sided shapes), reddish-brown color, and high hardness. Commonly found worldwide in metamorphic terranes, river gravels, and beach sands.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary