sedimentary

Red Jasper (specifically Brecciated Jasper)

Silicon Dioxide (SiO2) with Hematite inclusions

Hardness: 6.5-7 on Mohs scale; Color: Brick red to deep dark red with black or brown veining; Luster: Vitreous to waxy (when polished); Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.6-2.9.

Hardness: 6
Color: Brick red to deep dark red with black or brown veining
Luster: Vitreous to waxy (when polished)

Identified April 13, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the deposition of silica-rich fluids in cracks or volcanic cavities. Brecciated jasper occurs when the parent rock is broken and later 'cemented' together by further silica deposits. It is found in deposits ranging from the Precambrian to recent geological eras.

Uses & applications

Primarily used for lapidary work, jewelry (cabs/beads), decorative ornaments, and as a metaphysical healing stone. Historically used for seals and amulets.

Geological facts

Jasper was a favorite gem in the ancient world; its name can be traced back to Greek, Hebrew, and Persian languages. It is known as the 'Supreme Nurturer' in folklore.

Field identification & locations

Identify by its opaque nature (unlike agate, light will not pass through it), its characteristic 'broken' pattern of red clasts, and its high hardness (it will scratch glass). Commonly found in South Africa, Brazil, Australia, and the USA.

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