sedimentary

Brecciated Jasper

Silicon dioxide with fragmented rock matrix (SiO2)

AI-generated identification · may be incorrect

Hardness of 6.5 to 7 on the Mohs scale, features a polished vitreous luster, displays a multicolor matrix of red, brown, and grey angular fragments, and has a microcrystalline structure.

Identified October 31, 2026More sedimentary →

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Physical properties

Hardness of 6.5 to 7 on the Mohs scale, features a polished vitreous luster, displays a multicolor matrix of red, brown, and grey angular fragments, and has a microcrystalline structure.

Formation & geological history

Formed when broken rock fragments are naturally cemented together by silica-rich hydrothermal fluids or sediments, typically within ancient fault zones.

Uses & applications

Widely utilized for decorative spheres, cabochons, polished carvings, and collectible display specimens.

Geological facts

The distinctive colorful patterns are created by iron oxide staining within the silica cement, making every polished sphere entirely unique.

Field identification & locations

Easily identified by its prominent angular multicolored clasts and high hardness; sourced globally from regions with significant tectonic and volcanic activity.