sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Hardness: 6.5-7 (Mohs scale); 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 March 15, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich solutions in hydrothermal veins or sedimentary environments. Its red color originates from iron oxide (hematite) inclusions incorporated during formation. Found in deposits ranging from Precambrian to more recent eras.

Uses & applications

Predominantly used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular 'pocket stone' in the metaphysical community. Historically used for seals and architectural ornamentation.

Geological facts

In antiquity, Red Jasper was known as the 'stone of endurance' and was a favorite of the Romans to symbolize strength. It is an opaque variety of chalcedony that contains up to 20% foreign materials, which determines its variety and color.

Field identification & locations

Identify in the field by its deep red color, opacity (it does not transmit light even on thin edges), and its smooth, waxy feel when tumbled. Common locations include India, Brazil, South Africa, and the southwestern United States.

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