mineral

Blue beach pebble, likely milky quartz or quartz-rich stone

Quartz (SiO₂), possibly a quartz-rich pebble; identification is tentative from the image

AI-generated identification · may be incorrect

Pale blue-white, smooth and water-rounded, with a dull to slightly waxy surface. If quartz, hardness is 7 Mohs, luster vitreous when freshly broken, and crystal structure is trigonal; the pebble’s exact composition cannot be confirmed visually.

Identified September 22, 2026More mineral →

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Physical properties

Formation & geological history

Likely weathered from a quartz-bearing rock and rounded by water or shoreline abrasion; quartz commonly forms in igneous and metamorphic rocks and veins across many geological ages.

Uses & applications

Quartz pebbles are used in landscaping, decorative crafts, and collections; this specimen appears to have little commercial value.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists weathering, making it common in beach and river gravels.

Field identification & locations

Look for hardness—quartz scratches glass—and a glassy fracture without cleavage. Similar pale pebbles occur on many coasts and may instead be other minerals or rock; a fresh fracture or simple tests would help identify it.