mineral

Likely rough garnet

Garnet-group mineral, possibly almandine (Fe₃Al₂(SiO₄)₃)

AI-generated identification · may be incorrect

Small, opaque-to-translucent brown-gray specimen with a glassy to dull luster and irregular surfaces; garnet typically has Mohs hardness 6.5–7.5 and a cubic crystal structure, but the photo does not show diagnostic crystal form or cleavage.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Garnets commonly form during metamorphism of aluminum-rich rocks and may also occur in igneous rocks or stream gravels; their age depends on the host rock and cannot be determined from the image.

Uses & applications

Garnet is used as an abrasive and, when transparent and attractive, as a gemstone; this small, rough piece appears mainly suitable for collecting.

Geological facts

Garnets are a group of related silicate minerals rather than a single mineral species, and their colors extend well beyond red.

Field identification & locations

The specimen’s appearance is consistent with, but does not confirm, garnet; hardness, density, and a fresh crystal face would help distinguish it from other dark minerals. Garnets occur worldwide, including in metamorphic terrains and placer deposits.