mineral

Milky quartz pebble

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Likely Mohs hardness 7; cloudy white to translucent, with a vitreous-to-waxy surface and no cleavage. The rounded shape and smooth surface suggest natural water wear or tumbling.

Identified October 4, 2026More mineral →

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Physical properties

Likely Mohs hardness 7; cloudy white to translucent, with a vitreous-to-waxy surface and no cleavage. The rounded shape and smooth surface suggest natural water wear or tumbling.

Formation & geological history

Quartz crystallizes from silica-rich fluids and is common in many rock types; milky appearance results from microscopic inclusions or fluid-filled cavities. The specimen’s geological age and source cannot be determined from the image.

Uses & applications

Quartz is used in glassmaking, electronics, and decorative objects; pebbles are also collected or used in crafts and landscaping.

Geological facts

Quartz has a trigonal crystal structure, though this rounded specimen shows no visible crystal faces.

Field identification & locations

A simple field check is its ability to scratch glass and resist scratching by a steel blade; look for a glassy fracture rather than cleavage. The image alone cannot distinguish quartz confidently from other pale, translucent materials.