mineral

Tumbled white quartz pebble

Quartz (silicon dioxide, SiO₂), possibly milky quartz

AI-generated identification · may be incorrect

Typically hardness 7 Mohs, white to translucent, with a vitreous-to-waxy luster; no visible cleavage and conchoidal fracture. The rounded shape indicates tumbling or natural water abrasion.

Identified August 13, 2026More mineral →

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Physical properties

Typically hardness 7 Mohs, white to translucent, with a vitreous-to-waxy luster; no visible cleavage and conchoidal fracture. The rounded shape indicates tumbling or natural water abrasion.

Formation & geological history

Quartz crystallizes from silica-rich igneous, metamorphic, and hydrothermal fluids; milky varieties contain microscopic fluid inclusions. Quartz is geologically widespread and ranges from Precambrian to modern deposits.

Uses & applications

Used as a decorative stone, craft/tumbled stone, aggregate, glassmaking feedstock, and source material for silica products; this small specimen has modest collectible value.

Geological facts

Milky quartz is one of the most abundant quartz varieties and commonly forms massive, nontransparent masses rather than distinct crystals.

Field identification & locations

Common in quartz veins, granite-rich gravels, pegmatites, and stream beds worldwide. A glass-scratch test can support identification, though it may damage the surface; a streak is white and quartz lacks cleavage.