sedimentary

Red Jasper

Chalcedony with Iron Oxide (SiO2)

Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Dull or waxy when polished, Crystal Structure: Microcrystalline trigonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91

Hardness: 6

Identified June 22, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed via the deposition of silica in hydrothermal veins or sedimentary environments, often occurring near volcanic activity where iron oxide inclusions provide the distinct red coloration. Found in Precambrian and younger formations.

Uses & applications

Used extensively in jewelry as beads and cabochons, lapidary carvings, ornamentation, and as a popular stone for chakra healing and collecting.

Geological facts

Red Jasper has been used since ancient times for amulets and seals. It was mentioned in the Bible as a stone of the High Priest's breastplate and was known as the 'stone of endurance' to ancient warriors.

Field identification & locations

Identify by its deep red, opaque appearance and smooth, non-porous surface. It will scratch glass and cannot be scratched by a knife. Common in diverse locations including India, Brazil, Madagascar, and the Southwestern United States.