sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (Microcrystalline); Cleavage: None (Conchoidal fracture); Specific gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish-red
Luster: Vitreous to dull

Identified May 16, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (Microcrystalline); Cleavage: None (Conchoidal fracture); Specific gravity: 2.58-2.91

Formation & geological history

Forms when silica-rich fluids permeate through volcanic ash or sedimentary deposits. The red color is caused by the inclusion of iron oxide (hematite) during the mineralization process.

Uses & applications

Widely used in jewelry making (cabochons, beads), decorative carvings, and as a popular stone for collectors and metaphysical practitioners.

Geological facts

Jasper has been used as a gemstone since antiquity; it was mentioned in the Bible and utilized by ancient Egyptians in amulets and seals. It is a variety of chalcedony.

Field identification & locations

Identify by its opaque quality, smooth waxy feel when polished, and deep red color that does not scratch easily with a steel knife. Commonly found in Brazil, India, USA, and South Africa.