mineral

Tumbled milky quartz pebble

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent, with a vitreous-to-waxy luster and indistinct internal veils. It has a trigonal crystal structure, no cleavage, conchoidal fracture, and specific gravity near 2.65.

Identified August 21, 2026More mineral →

Explore Tumbled milky 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, hydrothermal, and metamorphic fluids; milky quartz commonly forms in veins and pegmatites, ranging from Precambrian to recent. The rounded shape indicates natural water wear or human tumbling/polishing.

Uses & applications

Used for ornamental stones, lapidary carvings, countertops, abrasives, and quartz products; this small piece has modest jewelry or collecting value.

Geological facts

The cloudy appearance is caused mainly by microscopic fluid inclusions and structural defects, not necessarily by impurities. Quartz is one of Earth’s most abundant minerals.

Field identification & locations

Identify it by its glassy/waxy appearance, lack of cleavage, hardness sufficient to scratch ordinary glass, and conchoidal fractures; common worldwide in quartz veins, river gravels, and pegmatites.