mineral

Tumbled quartz-rich stone, possibly milky quartz or quartzite

Quartz (SiO₂), potentially quartzite (metamorphic rock)

AI-generated identification · may be incorrect

White to cream, translucent edges, vitreous to dull luster, rounded from tumbling or abrasion; quartz hardness is Mohs 7, with no cleavage and conchoidal fracture. The image is insufficient to confirm crystal texture or specific gravity.

Identified August 30, 2026More mineral →

Explore Tumbled quartz-rich stone, possibly milky quartz or quartzite 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 forms in igneous, metamorphic, and hydrothermal environments; quartzite forms when quartz sandstone is recrystallized during metamorphism. The specimen’s natural age is indeterminate, while its rounded shape may result from stream wear or polishing.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, countertops, and decorative objects; attractive pieces are sold as inexpensive lapidary material.

Geological facts

Quartz is one of Earth’s most abundant minerals and is chemically resistant, allowing quartz-rich pebbles to survive extensive weathering.

Field identification & locations

Look for glassy luster, hardness sufficient to scratch ordinary glass, lack of cleavage, and white translucence; acid testing is generally unnecessary. Common worldwide, especially in veins, granitic terrains, quartzite outcrops, and river gravels.