sedimentary

Breciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Red, cream, beige, brown patterns; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Red, cream, beige, brown patterns
Luster: Vitreous to dull

Identified May 10, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Red, cream, beige, brown patterns; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the fracturing of jasper and the subsequent 'healing' or bonding by another mineral, often hematite or chalcedony, filing the cracks. This process usually occurs in hydrothermal or sedimentary environments.

Uses & applications

Primarily used for lapidary work, jewelry, decorative carvings (like the tower shown), and as a collector's specimen.

Geological facts

Brecciated Jasper gets its name from the word 'breccia,' a geological term for rock composed of broken fragments of minerals or rock cemented together by a fine-grained matrix.

Field identification & locations

Identify by its characteristic fragmented or 'jigsaw' appearance where distinct chunks of jasper are surrounded by vein-like material. It is commonly found globally, with notable deposits in South Africa, Brazil, and the USA.