gemstone

Polished garnet cabochon (likely almandine)

Almandine garnet, Fe₃Al₂(SiO₄)₃ (tentative identification)

AI-generated identification · may be incorrect

Dark reddish-brown, rounded polished surface with vitreous luster; garnet is typically Mohs 6.5–7.5 and cubic, with no cleavage. The image alone does not show enough detail to confirm the mineral or its properties.

Identified October 2, 2026More gemstone →

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Physical properties

Formation & geological history

Garnets commonly form during regional metamorphism of aluminum-rich rocks; some occur in igneous rocks. Their ages vary with the host deposit.

Uses & applications

Used in jewelry and as an abrasive; this cabochon appears suitable for setting in jewelry.

Geological facts

Garnet is a mineral group, not a single species; color and appearance alone cannot reliably distinguish its varieties.

Field identification & locations

A hard, glassy polish and lack of cleavage are consistent with garnet, but confirmation requires tests or gemological examination. Garnets occur worldwide, including India, Sri Lanka, and the United States.