mineral

White quartz pebble

Quartz (SiO₂), likely milky quartz

AI-generated identification · may be incorrect

Typically hardness 7 Mohs, white to translucent, vitreous-to-waxy luster, no cleavage, conchoidal fracture, and specific gravity about 2.65. The rounded shape indicates natural water or abrasion wear.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous and hydrothermal fluids, then survives weathering as resistant pebbles in stream, beach, or glacial deposits; the specimen’s exact age and source cannot be determined from the image.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, engineered stone, electronics, and decorative landscaping; attractive pieces may be tumbled or collected.

Geological facts

Milky color results from microscopic fluid inclusions, fractures, or impurities that scatter light. Quartz is one of Earth’s most abundant and durable minerals.

Field identification & locations

Identify it by its white/translucent appearance, glassy luster, lack of cleavage, and ability to scratch ordinary glass; it should not be confused with softer calcite or man-made glass. Common worldwide, especially in quartz veins and alluvial gravels.