mineral

Tumbled red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored red by iron oxides

AI-generated identification · may be incorrect

Smooth, opaque reddish-brown stone with a polished, waxy-to-glassy luster; quartz crystal structure, no visible cleavage, Mohs hardness about 6.5–7, specific gravity about 2.6.

Identified October 12, 2026More mineral →

Explore Tumbled red jasper in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Smooth, opaque reddish-brown stone with a polished, waxy-to-glassy luster; quartz crystal structure, no visible cleavage, Mohs hardness about 6.5–7, specific gravity about 2.6.

Formation & geological history

Formed when silica-rich fluids deposited and cemented fine-grained silica, often with iron oxides, in fractures or sedimentary settings. Jasper occurs in rocks of many ages; this image shows a shaped and polished specimen.

Uses & applications

Used for beads, cabochons, ornaments, and collectibles; it has no major industrial use as a small polished stone.

Geological facts

Jasper is a trade name for colorful, opaque chalcedony and may include varied mineral impurities that create its color and patterns.

Field identification & locations

The uniform red-brown color and opaque, hard, silica-rich surface are consistent with red jasper, though a photo cannot confirm identity. Jasper is found worldwide, including in India, Brazil, Australia, and the western United States.