mineral

Quartz gravel/specimen chips

Quartz (silicon dioxide, SiO₂), likely mixed with weathered feldspar or calcite

AI-generated identification · may be incorrect

Mostly translucent to white, irregular granular fragments with vitreous to dull luster; quartz has Mohs hardness 7, no cleavage, hexagonal crystal structure, and specific gravity about 2.65. The tan coating or associated material may be iron oxides, feldspar, or calcite, which cannot be confirmed from the image.

Identified September 20, 2026More mineral →

Explore Quartz gravel/specimen chips 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 naturally weathered and transported vein quartz or pegmatitic material; quartz formed from silica-rich fluids or cooling magma, commonly in Precambrian to younger rocks. The specimen appears crushed or naturally gravel-sized rather than a single intact crystal.

Uses & applications

Used in glass, ceramics, foundry sand, construction aggregate, countertops, and abrasives; clear attractive pieces may be collected or used decoratively. Commonly found in quartz veins, pegmatites, hydrothermal deposits, stream gravels, and beaches.

Geological facts

Identify quartz by its glassy appearance, lack of cleavage, hardness sufficient to scratch ordinary glass, and white streak. Common sources include Arkansas, Brazil, Madagascar, and many regional gravel deposits.