Rock Identifier
Red garnet crystal (possible almandine) (Garnet group; likely almandine, Fe₃Al₂(SiO₄)₃) — mineral
mineral

Red garnet crystal (possible almandine)

Garnet group; likely almandine, Fe₃Al₂(SiO₄)₃

AI-generated identification · may be incorrect

Deep red, translucent-to-opaque crystal with a vitreous luster and roughly equant form; garnet hardness is 6.5–7.5 Mohs, typically lacks cleavage, and commonly forms cubic-system crystals. The photo does not show enough detail to confirm species or composition.

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Physical properties

Deep red, translucent-to-opaque crystal with a vitreous luster and roughly equant form; garnet hardness is 6.5–7.5 Mohs, typically lacks cleavage, and commonly forms cubic-system crystals. The photo does not show enough detail to confirm species or composition.

Formation & geological history

Garnets commonly crystallize during metamorphism of aluminum-rich rocks, though some form in igneous rocks; their ages depend on the host rock and can range from millions to billions of years.

Uses & applications

Used as gemstones and abrasives; fine transparent crystals are cut for jewelry, while opaque specimens are mainly collected.

Geological facts

Garnet is a mineral group, not a single species; its members span red, green, orange, and other colors.

Field identification & locations

Look for a hard, glassy red crystal, often with dodecahedral or trapezohedral faces, in metamorphic rocks or stream gravels. The image alone cannot establish that this red object is a natural crystal rather than a manufactured piece.