sedimentary
Red Breccia Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Hardness of 6.5-7 on the Mohs scale, red and black mottled color, vitreous to dull luster, microcrystalline quartz structure, specific gravity around 2.65
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Physical properties
Hardness of 6.5-7 on the Mohs scale, red and black mottled color, vitreous to dull luster, microcrystalline quartz structure, specific gravity around 2.65
Formation & geological history
Formed through the fracturing of rock masses by tectonic activity, with the fragments subsequently cemented together by silica-rich hydrothermal fluids or sediments, often occurring in ancient marine environments.
Uses & applications
Used in ornamental carvings, polished stones, lapidary arts, and gemstone jewelry
Geological facts
Brecciated jasper gets its striking appearance from broken fragments that create a mosaic pattern, cemented together by another mineral.
Field identification & locations
Easily identified by its distinct angular fragments cemented in a contrasting matrix, high hardness, and conchoidal fracture. Found worldwide in regions with past volcanic or tectonic activity.
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