mineral

Likely quartz-rich pebble or weathered limestone fragment

Indeterminate; possibly microcrystalline quartz (SiO₂) or calcite-rich limestone (CaCO₃)

AI-generated identification · may be incorrect

Small rounded, pale gray-beige specimen with a dull to weakly vitreous luster and irregular cream-colored patches. Quartz has Mohs hardness 7 and no cleavage; calcite has hardness 3, prominent cleavage, and fizzes with dilute hydrochloric acid.

Identified September 7, 2026More mineral →

Explore Likely quartz-rich pebble or weathered limestone fragment 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 and transported pebble formed in a sedimentary environment; its geological age cannot be determined from the image.

Uses & applications

Ordinary pieces have no significant industrial or jewelry value, though quartz-rich material may be used as aggregate or decorative stone.

Geological facts

The image lacks sufficient detail for confident identification; apparent surface markings may reflect weathering, fracture, or mineral veins.

Field identification & locations

Test hardness against steel and glass, inspect for translucent edges, and apply dilute acid: vigorous fizzing indicates calcite/limestone. Commonly found in stream gravels, soils, and sedimentary outcrops.