mineral

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

AI-generated identification · may be incorrect

Small translucent triangular fragment with gray-brown coloration, vitreous to waxy luster, and irregular edges; quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65. The image is insufficient to distinguish quartz, chalcedony, or glass confidently.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Quartz-bearing material forms in igneous, metamorphic, and hydrothermal environments; chalcedony commonly precipitates in cavities and fractures. Its geological age cannot be determined from the photograph.

Uses & applications

Quartz and chalcedony are used as abrasives, fillers, aggregate, and ornamental stone; attractive pieces may be used in cabochons or collected. This fragment appears to have minimal commercial value.

Geological facts

The triangular shape may reflect cutting, breakage, or a naturally bounded fragment rather than crystal form. Translucency and conchoidal-looking fracture favor silica, but man-made glass is a possible alternative.

Field identification & locations

Check with a 7+ hardness test: it should scratch ordinary glass, while glass typically cannot scratch quartz. Look for bubbles or flow lines, which suggest glass; a loupe, streak test, and specific-gravity measurement would improve identification.