sedimentary

Brecciated Jasper

Silicon Dioxide (SiO2) with Hematite and Epidote/Chlorite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5 - 7 on the Mohs scale; Color: deep brick-red with dark green, grayish-green, and cream-white breccia fragments/veins; Luster: vitreous to waxy (high polish); Crystal Structure: microcrystalline/cryptocrystalline (trigonal quartz); Fracture: conchoidal; Specific Gravity: ~2.58 - 2.65.

Hardness: 6
Luster: vitreous to waxy (high polish)

Identified October 3, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when fractured microcrystalline chert/jasper is cemented together by secondary silica, often accompanied by hematite (giving the deep red color) and mineral veins containing epidote, chlorite, or quartz during hydrothermal or diagenetic processes.

Uses & applications

Popular lapidary material carved into decorative objects (such as polished eggs, spheres, and cabochons), used in ornamental carvings, and widely collected for metaphysical/gemstone collections.

Geological facts

Brecciation occurs during tectonic shifts or seismic events where the original stone is shattered and later re-healed with mineral-rich hydrothermal solutions over millions of years.

Field identification & locations

Identified by its distinctive angular, fragmented patterns enclosed in a fine-grained, opaque chalcedony matrix that takes a brilliant glassy polish. Common localities include South Africa, Brazil, Australia, and the Western United States.