mineral

Red Garnet (likely Almandine)

Almandine (Fe3Al2(SiO4)3)

Hardness: 6.5–7.5; Color: Deep red to reddish-brown; Luster: Vitreous to resinous; Crystal structure: Isometric (dodecahedral habit); Cleavage: None; Specific gravity: 4.1–4.3

Hardness: 6
Color: Deep red to reddish-brown
Luster: Vitreous to resinous

Identified April 25, 2026More mineral →

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Physical properties

Hardness: 6.5–7.5; Color: Deep red to reddish-brown; Luster: Vitreous to resinous; Crystal structure: Isometric (dodecahedral habit); Cleavage: None; Specific gravity: 4.1–4.3

Formation & geological history

Usually forms in metamorphic environments like schists and gneisses under high pressure and temperature; also found in certain igneous rocks. Garnets can be found in rocks ranging from millions to billions of years old.

Uses & applications

Used as a gemstone in jewelry, as an industrial abrasive for waterjet cutting and sandblasting, and in filtration systems.

Geological facts

Garnet is the birthstone for January. The name 'garnet' comes from the Latin word 'granatus', meaning seed-like, referring to its resemblance to pomegranate seeds. It was a popular gemstone in the Victorian era.

Field identification & locations

Identify in the field by its distinct 12-sided (dodecahedral) shape, high density (it feels heavy for its size), and deep red translucent color when held to light. Often found in river gravels as 'ruby sand' or embedded in micaceous schist.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral