mineral

Quartz-rich pebble fragment

Likely milky quartz with iron-oxide staining; exact identification is uncertain from the photo

AI-generated identification · may be incorrect

Small rounded, cream-white fragment with translucent quartz-like areas and orange-brown staining; vitreous to dull luster, no obvious cleavage, Mohs hardness about 7, and specific gravity near 2.65. The visible grainy texture may indicate quartzite or a quartz-bearing rock rather than a single crystal.

Identified September 22, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in igneous and hydrothermal veins, while quartzite forms when quartz sandstone is metamorphosed; iron staining develops through weathering. Its age cannot be determined visually and depends on the source deposit.

Uses & applications

Common quartz is used in glass, ceramics, electronics, abrasives, and engineered stone; attractive pieces may be collected but are generally not jewelry grade.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly survives transport as rounded stream or beach pebbles.

Field identification & locations

Likely identified by its pale color, glassy/translucent appearance, lack of cleavage, and resistance to scratching; a steel file should not scratch it, though testing may damage the specimen. Common in stream gravels worldwide.