sedimentary

Brecciated Jasper

Silicon Dioxide (SiO2) with hematite and other mineral impurities

Hardness of 6.5 to 7 on the Mohs scale, red, brown, and white coloration with angular fragments, vitreous to dull luster, microcrystalline quartz (chalcedony) structure, conchoidal fracture, specific gravity around 2.58 to 2.91.

Identified August 1, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when existing jasper or rock layers are broken apart by tectonic forces and the fragments are subsequently cemented back together by silica-rich hydrothermal fluids or sediments, typically in ancient marine or volcanic environments.

Uses & applications

Used primarily in lapidary arts, tumbled stones, cabochons for jewelry, decorative objects, and as a collector specimen.

Geological facts

Breccia jaspers are prized for their chaotic, stained-glass-like patterns which are completely unique to each individual stone. The red colors are typically caused by inclusions of iron oxide or hematite.

Field identification & locations

Can be identified by its hard, microcrystalline texture, characteristic multi-colored angular fragments cemented in a matrix, and lack of reaction to acid. Found worldwide including in Brazil, India, Russia, and the USA.

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Sandstone or Siltstone

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Quartz pebble

Silicon dioxide (SiO2)

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Banded Siltstone / Mudstone Pebble

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