mineral

Likely milky quartz pebble

Quartz (SiO₂)

AI-generated identification · may be incorrect

Small rounded, opaque white-to-pale-gray specimen with dark inclusions or surface marks and a dull-to-vitreous luster. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and conchoidal fracture; specific gravity is about 2.65.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Likely a weathered fragment of quartz-rich rock, rounded by transport in sediment or water. Quartz forms in many geological settings and spans a vast range of geological ages; this specimen’s age and source cannot be determined from the image.

Uses & applications

Common quartz is used in glass, ceramics, electronics, and construction; attractive specimens are collected or used decoratively.

Geological facts

Quartz is one of Earth’s most abundant minerals and is highly resistant to weathering, so it commonly survives as rounded pebbles.

Field identification & locations

The white, hard appearance is consistent with milky quartz, but the image alone cannot confirm the identification or dark markings. Common worldwide; a scratch test on an inconspicuous spot (quartz should scratch glass) can help distinguish it.