sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Brick red to brownish red; Luster: Vitreous to waxy (especially when tumbled); Crystal Structure: Hexagonal (Trigonal), microcrystalline; Cleavage: None

Hardness: 6
Color: Brick red to brownish red
Luster: Vitreous to waxy (especially when tumbled)

Identified July 10, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Brick red to brownish red; Luster: Vitreous to waxy (especially when tumbled); Crystal Structure: Hexagonal (Trigonal), microcrystalline; Cleavage: None

Formation & geological history

Formed through the accumulation of fine volcanic ash or silica-rich sediments, where iron oxides (hematite) infiltrate the silica during the lithification process, resulting in its deep red opaque color.

Uses & applications

Primarily used for lapidary work, jewelry (cabochons, beads), decorative carvings, and as a popular stone for tumbling and crystal healing collections.

Geological facts

Red Jasper is known as an opaque variety of chalcedony. It has been used since antiquity in seals, jewelry, and ornamentation by Egyptians and Minoans. It is often referred to as a stone of endurance.

Field identification & locations

Identify by its solid red color, high hardness (it cannot be scratched by a steel knife), and its smooth, opaque appearance. Commonly found in Brazil, India, South Africa, and the USA.