mineral

Tumbled white quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

AI-generated identification · may be incorrect

White to translucent, glassy-to-waxy luster, hardness 7 Mohs, no cleavage, conchoidal fracture, trigonal crystal structure, and specific gravity about 2.65. Its rounded shape indicates natural abrasion or tumbling.

Identified August 13, 2026More mineral →

Explore Tumbled white quartz pebble in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous, metamorphic, or hydrothermal fluids; milky quartz commonly forms in veins. The specimen’s geological age cannot be determined visually and may range from ancient to relatively young.

Uses & applications

Used in glass, ceramics, electronics, abrasives, and engineered stone; attractive pieces are used for inexpensive ornaments and lapidary work.

Geological facts

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

Field identification & locations

Identify it by its white/translucent appearance, lack of cleavage, hardness sufficient to scratch ordinary glass, and conchoidal fracture. Common worldwide, especially in quartz veins and stream gravels.