mineral

Quartz-rich pebble, possibly milky quartz with dark inclusions

Quartz (silicon dioxide, SiO₂), likely with iron-oxide or mica inclusions

AI-generated identification · may be incorrect

White to gray, opaque-to-translucent, with vitreous luster and irregular fracture; quartz hardness is Mohs 7, with no cleavage and a hexagonal crystal structure. The specimen appears water-worn and rounded, though the image is not detailed enough for certainty.

Identified August 29, 2026More mineral →

Explore Quartz-rich pebble, possibly milky quartz with dark inclusions 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

Likely a naturally weathered stream or beach pebble formed from quartz-bearing igneous or metamorphic rock; quartz commonly crystallized during cooling of magma or hydrothermal activity. Its precise geological age and source cannot be determined visually.

Uses & applications

Quartz is used in glass, ceramics, electronics, abrasives, and construction aggregate; attractive pieces may be collected or polished. This small ordinary pebble has little commercial value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is highly resistant to weathering, allowing it to accumulate in gravel beds and beaches.

Field identification & locations

Look for hardness sufficient to scratch ordinary glass, no cleavage, and a glassy fracture; a steel nail should not scratch it. Common worldwide in river gravels, beaches, veins, granite, and metamorphic rocks.