sedimentary
Red Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Hardness: 6.5-7 (Mohs scale), Color: Brick red with brown or black veining, Luster: Vitreous to dull, Crystal Structure: Trigonal/Microcrystalline, Specific Gravity: 2.6-2.9
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Brick red with brown or black veining, Luster: Vitreous to dull, Crystal Structure: Trigonal/Microcrystalline, Specific Gravity: 2.6-2.9
Formation & geological history
Formed through the accumulation of silica-rich sediments where original jasper is broken by tectonic activity and then re-cemented by a later silica or hematite flow.
Uses & applications
Primarily used for ornamental purposes, lapidary art, jewelry, and as a popular decorative gemstone in carving and polished geometric shapes like points.
Geological facts
The term 'brecciated' comes from the Italian word 'breccia', meaning 'gravel' or 'broken stones', referring to the angular fragments cemented together within the specimen.
Field identification & locations
Look for sharp, angular red fragments separated by darker veins of hematite or sparkling quartz. It is widely collected globally with significant deposits in Brazil, Australia, and the USA.
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