metamorphic
Garnet Schist
Almandine Garnet in Schist (X3Al2(SiO4)3)
Hardness: 6.5-7.5 (garnets), Color: Reddish-brown crystals in a gray/brown matrix, Luster: Vitreous to resinous, Crystal Structure: Isometric (dodecahedral), Cleavage: Indistinct
- Hardness
- 6
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Physical properties
Hardness: 6.5-7.5 (garnets), Color: Reddish-brown crystals in a gray/brown matrix, Luster: Vitreous to resinous, Crystal Structure: Isometric (dodecahedral), Cleavage: Indistinct
Formation & geological history
Formed through high-pressure and high-temperature regional metamorphism of clay-rich sedimentary rocks (pelites) during mountain-building events. Typically found in mica schists.
Uses & applications
Garnets are used as industrial abrasives (sandpaper, waterjet cutting), and high-quality specimens are used in jewelry. This specific rough specimen is primarily for education or private collections.
Geological facts
Garnet is the state mineral of Connecticut and New York. It has been used as a gemstone since the Bronze Age and is the birthstone for January.
Field identification & locations
Identify by looking for small, rounded, dark red or brown 'balls' embedded in a flaky, mica-rich rock. Commonly found in metamorphic belts like the Appalachians or the Alps.
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