mineral

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

The small, pale translucent-to-opaque piece appears to be massive quartz, with a vitreous surface and no obvious cleavage. Quartz has Mohs hardness 7, a trigonal crystal structure, and specific gravity about 2.65; the photo does not show enough detail to confirm its exact variety.

Identified September 29, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly forms when silica-rich fluids crystallize in veins or cavities, and it can also persist as rounded pebbles after erosion. Its age and precise geological setting cannot be determined from the image.

Uses & applications

Quartz is used in glassmaking, electronics, abrasives, and decorative objects; attractive pieces may be used in jewelry or collected.

Geological facts

Quartz is one of Earth’s most abundant minerals. Its conchoidal fracture and hardness help distinguish it from softer pale stones.

Field identification & locations

The cream-white color and translucent appearance are consistent with milky quartz, but visual identification is provisional. Look for hardness near 7, glassy luster, and lack of cleavage; common sources include quartz veins and river or beach gravels.