mineral

Quartz pebble in a coarse mineral-rich rock

Quartz (SiO₂), possibly in a quartz-rich conglomerate or breccia

AI-generated identification · may be incorrect

The rounded white pebble is likely quartz: Mohs hardness 7, vitreous to waxy luster, white to translucent, and no cleavage. The surrounding angular grains and fragments appear to include assorted rock-forming minerals; the image is too indistinct for reliable identification.

Identified October 14, 2026More mineral →

Explore Quartz pebble in a coarse mineral-rich rock 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 many igneous, metamorphic, and sedimentary settings; a pebble embedded among fragments may have been deposited and cemented in sediment. Age and exact formation environment cannot be determined from the image.

Uses & applications

Quartz is used in glassmaking, electronics, abrasives, and jewelry; conglomerates and breccias are mainly ornamental or collectible.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists weathering, so it commonly survives transport as rounded pebbles.

Field identification & locations

Look for glassy luster, hardness sufficient to scratch glass, and lack of cleavage. The specimen’s texture and rock type would need a sharper view or examination in hand to confirm.