mineral

Garnet (specifically Almandine or Pyrope)

Almandine: Fe3Al2(SiO4)3 or Pyrope: Mg3Al2(SiO4)3

AI-generated identification · may be incorrect

Hardness: 6.5–7.5 Mohs. Color: Deep red, brownish-red to black. Luster: Vitreous to resinous. Crystal structure: Isometric (dodecahedral). Cleavage: None (conchoidal fracture). Specific Gravity: 3.5–4.3.

Hardness: 6
Color: Deep red, brownish-red to black
Luster: Vitreous to resinous

Identified March 15, 2026More mineral →

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Physical properties

Formation & geological history

Formed primarily in metamorphic rocks like mica schists or gneisses under high pressure and temperature; also found in certain igneous rocks like peridotite or as alluvial deposits in riverbeds.

Uses & applications

Used widely as a gemstone in jewelry, but also industrially as an abrasive for sandblasting and water-jet cutting due to its hardness and sharp edges when crushed.

Geological facts

Garnet is the official birthstone for January. The name 'garnet' comes from the Latin 'granatus' meaning pomegranate, referring to the resemblance of its crystals to red pomegranate seeds.

Field identification & locations

Identify in the field by its distinct deep red color, lack of cleavage, and dodecahedral crystal shape. Common locations include New York (USA), Tanzania, India, and Sri Lanka. Collectors look for clarity and well-defined crystal faces.