mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
AI-generated identification · may be incorrectHardness of 7.5 to 8 on the Mohs scale, deep red to brownish-red color, vitreous to subadamantine luster, and isometric crystal system.
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Physical properties
Hardness of 7.5 to 8 on the Mohs scale, deep red to brownish-red color, vitreous to subadamantine luster, and isometric crystal system.
Formation & geological history
Forms in metamorphic rocks like schists and gneisses through regional metamorphism of iron and aluminum-rich argillaceous sediments.
Uses & applications
Commonly used as a gemstone in jewelry and as an abrasive in waterjet cutting and sandblasting.
Geological facts
Almandine is the most common variety of garnet and is often referred to as the carbuncle in ancient literature.
Field identification & locations
Identified by its dark red color, high hardness, and dodecahedral crystal habit; found worldwide, notably in India, Brazil, and the USA.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Limonite
FeO(OH)•nH2O
mineral
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