sedimentary

Red Breccia Jasper

Silicon Dioxide (SiO2) with hematite and various mineral inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 on the Mohs scale. Color: Red, brown, white, and grayish mottled patterns. Luster: Vitreous to dull. Crystal structure: Trigonal (microcrystalline quartz). Cleavage: None (conchoidal fracture). Specific gravity: 2.58-2.91.

Hardness: 6
Color: Red, brown, white, and grayish mottled patterns
Luster: Vitreous to dull

Identified August 3, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from fragments of rock (clasts) cemented together by a fine-grained matrix, often rich in iron oxides (hematite), which gives it the characteristic red coloration. Formed in ancient hydrothermal environments or sedimentary basins over millions of years.

Uses & applications

Used primarily for making jewelry, ornamental carvings, polished stones, and lapidary art.

Geological facts

Jasper has been used since ancient times for talismans, seals, and jewelry. The 'brecciated' variety features angular fragments that were naturally broken and then cemented back together by silica.

Field identification & locations

Easily identified by its opaque nature, hardness, waxy-to-vitreous luster, and distinct multicolored brecciated patterns. Found worldwide including India, Brazil, Russia, and the USA.