mineral

Garnet fragments

Garnet-group silicate, most likely almandine–pyrope or spessartine; composition varies, commonly (Fe,Mg,Mn)₃Al₂Si₃O₁₂

AI-generated identification · may be incorrect

Deep red to reddish-brown, translucent grains with vitreous luster and conchoidal-looking fractures. Garnet is typically Mohs 6.5–7.5, cubic/isometric, lacks cleavage, and has specific gravity about 3.5–4.3; the pieces appear naturally broken or rough-cut rather than well-formed crystals.

Identified September 20, 2026More mineral →

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Physical properties

Formation & geological history

Garnets form mainly in metamorphic rocks such as schist and gneiss, though some occur in igneous rocks and placer deposits. Their exact age cannot be determined from the photograph; local Ethiopian basement rocks can plausibly host garnet-bearing metamorphic material.

Uses & applications

Used as an abrasive, waterjet medium, and occasionally as a gemstone. Attractive transparent red pieces may be faceted, but these fragments appear mainly specimen or industrial-abrasive grade.

Geological facts

Red garnet is commonly almandine or pyrope; orange-red material may be spessartine. Garnet’s absence of cleavage helps distinguish it from ruby and many red feldspars.

Field identification & locations

Likely garnet, but species identification requires refractive index, density, or chemistry. Test for hardness against quartz, inspect for a cubic crystal form, and check that it does not split along cleavage planes. At 6.7°N, 38.4°E, garnet-bearing metamorphic material is geologically plausible, but locality alone cannot confirm species.