sedimentary
Red Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Hardness: 6.5-7 (Mohs scale), Color: Red, brown, cream, and grey marbling, Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline), Cleavage: None, Specific Gravity: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Red, brown, cream, and grey marbling, Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline), Cleavage: None, Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the accumulation of silica in sedimentary environments. Brecciation occurs when the rock is fractured by tectonic activity and then reheated or resealed by new silica deposits (often clear quartz or chalcedony) filling the cracks.
Uses & applications
Commonly used for lapidary work, small carvings, decorative figurines, cabochons for jewelry, and as a 'grounding' stone in metaphysical collecting.
Geological facts
Brecciated jasper contains hematite, which provides the deep red color. 'Breccia' comes from the Italian word for rubble, reflecting the shattered and re-cemented look of the stone.
Field identification & locations
Identified by its chaotic patterns of red opaque stone broken by veins of other minerals. It is found globally, with major deposits in Brazil, South Africa, and the USA. Collectors look for high contrast between the red fragments and the matrix.
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