mineral

Likely quartz-bearing rock or mineral fragment

Indeterminate; possibly quartz (SiO₂) with iron-oxide staining and darker matrix

AI-generated identification · may be incorrect

Small rough fragment with translucent gray-brown surfaces, yellow-brown staining, and a glassy to dull luster. Quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and hexagonal crystal structure; the specimen’s exact properties require testing.

Identified September 7, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed in a hydrothermal vein or weathered host rock; age cannot be determined from the photograph. Iron oxidation may account for the yellow-brown coloration.

Uses & applications

Quartz-rich material is used in glass, electronics, abrasives, and construction; attractive crystals may be collected, though this fragment appears ordinary.

Geological facts

The image is too close and slightly out of focus for confident mineral identification; visible sparkle may reflect tiny quartz faces or mica.

Field identification & locations

Test with a steel knife or glass: quartz should scratch glass and resist a knife. Common sources include quartz veins and weathered igneous or metamorphic rocks worldwide.