sedimentary

Red Jasper

Silicon Dioxide (SiO2) with impure Iron oxides

AI-generated identification · may be incorrect

Hardness: 6.5-7.0 (Mohs scale); Color: Red, orangish-red to brownish-red; Luster: Dull to sub-vitreous; Crystal Structure: Microcrystalline Trigonal; Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Red, orangish-red to brownish-red
Luster: Dull to sub-vitreous

Identified May 15, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7.0 (Mohs scale); Color: Red, orangish-red to brownish-red; Luster: Dull to sub-vitreous; Crystal Structure: Microcrystalline Trigonal; Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Jasper is an opaque variety of chalcedony formed through the deposition of silica in fluid-rich environments, often occurring in volcanic or sedimentary beds. The red color is derived from iron inclusions during the mineralization process over millions of years.

Uses & applications

Commonly used as a gemstone for jewelry (cabochons, beads), decorative carvings, lapidary arts, and as a popular specimen for crystal collectors.

Geological facts

Red Jasper has been used since ancient times for amulets and seals. It was highly valued in Babylonian, Egyptian, and Native American cultures as a stone of protection and endurance.

Field identification & locations

Identify by its non-transparent (opaque) body, heavy feel, and conchoidal fracture pattern. It can be found globally in riverbeds, deserts, and volcanic regions. Collectors look for uniform color or unique patterns without excessive cracking.