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 resinous luster, and isometric crystal system 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 resinous luster, and isometric crystal system with no true cleavage.
Formation & geological history
Forms in metamorphic rocks like schists and gneisses through regional metamorphism, as well as in igneous pegmatites.
Uses & applications
Used primarily as a gemstone in jewelry and as an industrial abrasive in waterjet cutting and sandblasting.
Geological facts
Almandine is the most common variety of garnet and was heavily used as a gemstone in ancient Roman and Anglo-Saxon jewelry.
Field identification & locations
Identify by its dark red-brown color, high hardness, and rounded dodecahedral or trapezohedral crystal habits in host schists.
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
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous