mineral

Tumbled quartz-rich pebble

Microcrystalline quartz (SiO₂), possibly milky quartz or quartzite

AI-generated identification · may be incorrect

Cream to honey-brown, opaque to weakly translucent, with a dull-to-waxy luster and irregular granular texture. Quartz hardness is Mohs 7; no obvious cleavage, conchoidal fracture, and specific gravity about 2.65.

Identified September 10, 2026More mineral →

Explore Tumbled quartz-rich 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

Likely a naturally rounded stream or beach pebble, or a tumbled specimen, formed by weathering and abrasion of quartz-rich igneous or metamorphic rock. Its precise geological age and source cannot be determined from the photograph.

Uses & applications

Common quartz pebbles are used decoratively, in landscaping, lapidary work, and inexpensive collections; attractive pieces may be polished or made into cabochons.

Geological facts

The orange-brown coloration may come from iron-oxide staining, while the pale body is consistent with milky quartz or quartzite. A steel knife should not scratch quartz, though it may leave a metallic streak.

Field identification & locations

Look for glassy or waxy luster, very high hardness, lack of cleavage, and conchoidal fracture; confirm with a scratch test on an inconspicuous area. Quartz-rich pebbles occur worldwide in stream gravels, beaches, and glacial deposits.