mineral

Garnet

Garnet group (X3Y2(SiO4)3)

Hardness: 6.5–7.5; Color: Typically red but exists in all colors except blue; Luster: Vitreous to resinous; Crystal system: Isometric; Cleavage: None/Indistinct; Specific Gravity: 3.1–4.3.

Hardness: 6
Color: Typically red but exists in all colors except blue
Luster: Vitreous to resinous

Identified June 7, 2026More mineral →

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Physical properties

Hardness: 6.5–7.5; Color: Typically red but exists in all colors except blue; Luster: Vitreous to resinous; Crystal system: Isometric; Cleavage: None/Indistinct; Specific Gravity: 3.1–4.3.

Formation & geological history

Typically forms in metamorphic rocks such as mica schist, gneiss, and amphibolite under high pressure and temperature; also found in certain igneous rocks like granite. Common across many geological ages.

Uses & applications

Used extensively as an industrial abrasive (sandblasting, waterjet cutting), in filtration media, and as a gemstone for jewelry.

Geological facts

Garnet is the birthstone for January. It was once believed to provide protection against nightmares and was used as an amulet by warriors in ancient times.

Field identification & locations

Identify in the field by its distinct dodecahedral or trapezohedral crystal habits and lack of cleavage. Commonly found in metamorphic terrains like the Adirondack Mountains or Alpine regions.