sedimentary

Red Jasper

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5–7 on the Mohs scale; Color: Red to brownish-red due to iron inclusions; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline quartz); Cleavage: None/Conchoidal fracture; Specific gravity: 2.6–2.9.

Hardness: 6
Color: Red to brownish-red due to iron inclusions
Luster: Vitreous to dull

Identified March 7, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the infiltration of silica-rich hydrothermal fluids into volcanic ash or fine-grained sediments, often occurring in volcanic or sedimentary environments across many geological ages.

Uses & applications

Commonly used for lapidary work, jewelry (beads, cabochons), ornamental vases, and as a popular 'healing' stone in holistic health communities.

Geological facts

Jasper is an opaque variety of chalcedony. Historically, it was known as the 'Supreme Nurturer' and has been used in amulets and seals ancient Egypt and Mesopotamia.

Field identification & locations

Identify in the field by its opaque nature (even on thin edges), its smooth conchoidal fracture, and the fact it cannot be scratched by a steel knife. Commonly found in riverbeds or gravel deposits in areas with volcanic history.