mineral

Rounded quartz pebble

Quartz, SiO₂ (likely massive milky quartz)

AI-generated identification · may be incorrect

Pale cream to peach with a white, slightly translucent patch; likely vitreous to dull luster and no visible cleavage. Quartz has Mohs hardness 7 and a trigonal crystal structure; the pebble’s smooth shape is from abrasion.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich fluids or magma and is highly resistant to weathering; this specimen was likely rounded in a stream or along a shore. Its precise geological age and source cannot be determined from the image.

Uses & applications

Common quartz is used in glassmaking, electronics, and decorative objects; this small pebble is mainly a collectible or craft material.

Geological facts

Quartz is one of Earth’s most abundant minerals and breaks with a curved, conchoidal fracture rather than cleaving along flat planes.

Field identification & locations

A hardness test (it scratches glass) and absence of cleavage can help identify quartz; it occurs worldwide in veins, igneous rocks, and sediment. The image does not reveal a specific locality.