Rock Identifier
Milky quartz pebble (Quartz, silicon dioxide (SiO₂)) — mineral
mineral

Milky quartz pebble

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Mostly white to gray, opaque, with a vitreous-to-waxy surface and irregular fracture; quartz has Mohs hardness 7 and a trigonal crystal structure, with no cleavage. The dark streaks may be inclusions or surface staining; exact identification from a photo is uncertain.

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Physical properties

Mostly white to gray, opaque, with a vitreous-to-waxy surface and irregular fracture; quartz has Mohs hardness 7 and a trigonal crystal structure, with no cleavage. The dark streaks may be inclusions or surface staining; exact identification from a photo is uncertain.

Formation & geological history

Quartz forms in many igneous, metamorphic, and hydrothermal settings and is highly resistant to weathering, so it commonly accumulates as rounded stream or beach pebbles. Its geological age cannot be determined from appearance alone.

Uses & applications

Quartz is used in glass, electronics, abrasives, and decorative stone; this pebble is mainly suitable for collecting or crafts.

Geological facts

Quartz is one of Earth’s most abundant minerals and can scratch ordinary glass.

Field identification & locations

Look for hardness near 7, a glassy appearance on fresh breaks, and no cleavage; common in river gravels and quartz-rich landscapes worldwide.

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Undetermined; the image is too blurry for reliable identification

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