
mineral
Garnet
Almandine/Pyrope Garnet (X3Y2(SiO4)3)
AI-generated identification · may be incorrectHardness: 6.5 to 7.5 on the Mohs scale. Color: Typically deep red to reddish-brown, brownish-black. Luster: Vitreous to resinous. Crystal structure: Isometric, commonly forming dodecahedrons or trapezohedrons. Cleavage: None (fractures conchoidally). Specific gravity: 3.5 to 4.3.
- Hardness
- 6
- Color
- Typically deep red to reddish-brown, brownish-black
- Luster
- Vitreous to resinous
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Physical properties
Hardness: 6.5 to 7.5 on the Mohs scale. Color: Typically deep red to reddish-brown, brownish-black. Luster: Vitreous to resinous. Crystal structure: Isometric, commonly forming dodecahedrons or trapezohedrons. Cleavage: None (fractures conchoidally). Specific gravity: 3.5 to 4.3.
Formation & geological history
Formed through regional or contact metamorphism, typically in mica schists, gneisses, and certain igneous rocks like granites and pegmatites, over millions of years.
Uses & applications
Widely used as gemstones in jewelry, as an abrasive in waterjet cutting and sandblasting, and valued by mineral collectors.
Geological facts
Garnet is the traditional birthstone for January and has been used as a gemstone since the Bronze Age. The name comes from the Latin word 'granatus', meaning grain, resembling pomegranate seeds.
Field identification & locations
Found worldwide, notably in India, Madagascar, Sri Lanka, and the United States. Easily identifiable by its distinct deep red color, vitreous luster, lack of cleavage, and high hardness.
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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