mineral

Weathered quartz-rich pebble

Likely milky quartz (SiO₂), possibly quartzite or a light-colored granitoid fragment

AI-generated identification · may be incorrect

Pale gray-white, opaque to translucent, with a dull-to-glassy luster and irregular granular texture; quartz hardness is about Mohs 7, with no cleavage and conchoidal fracture. The rounded shape indicates abrasion, while surface weathering obscures the original texture.

Identified September 4, 2026More mineral →

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Physical properties

Formation & geological history

Probably a naturally weathered stream, beach, or soil pebble derived from quartz vein material, quartzite, or granite. Its exact geological age and source cannot be determined from the photograph alone; quartz commonly forms in igneous and hydrothermal settings and survives erosion well.

Uses & applications

Common pieces have little industrial or jewelry value, though quartz is widely used in glass, ceramics, electronics, abrasives, and engineered stone. Attractive pieces may be used as curios or landscaping material.

Geological facts

Quartz is one of Earth’s most abundant minerals and is highly resistant to chemical and physical weathering. The specimen could also contain minor feldspar or mica, which would require close examination or testing to confirm.

Field identification & locations

Look for hardness sufficient to scratch ordinary glass, lack of cleavage, and a white streak; a steel nail should not scratch clean quartz. Common sources include river gravels, beaches, quartz veins, and granitic terrains.