mineral

Quartz-rich rock, possibly milky quartz with iron staining

Predominantly silicon dioxide (SiO₂); exact rock type cannot be determined from the photo

AI-generated identification · may be incorrect

Rough, irregular gray-white specimen with pale yellow/rust-colored patches and a dull to slightly glassy luster. Quartz has Mohs hardness 7 and a trigonal crystal structure, but hardness and cleavage cannot be confirmed visually.

Identified September 27, 2026More mineral →

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Physical properties

Formation & geological history

If quartz-rich, it likely formed when silica-bearing fluids deposited quartz in a vein or fracture; the specimen’s age and setting are unknown.

Uses & applications

Quartz is used in glassmaking, electronics, abrasives, and decorative stone; this small, unverified piece is mainly suitable for collecting.

Geological facts

Yellow or rusty areas may be iron-oxide staining, though lighting and image quality make identification uncertain.

Field identification & locations

Quartz commonly occurs in veins and many rock types; confirm by testing whether it scratches glass and checking for conchoidal fracture. The photo alone does not support a more specific identification.