sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron inclusions

Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish red, Luster: Vitreous to waxy, Crystal Structure: Microcrystalline (trigonal), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.91

Hardness: 6

Identified May 12, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed primarily through the deposition of silica from mineral-rich waters in hydrothermal veins or sedimentary environments. Its red color is derived from high iron content (hematite inclusions). Age varies globally from Precambrian to more recent eras.

Uses & applications

Used extensively in jewelry making for cabochons and beads, as an ornamental stone in carving, and occasionally in architecture as a decorative surface. It is also a popular stone for lapidary enthusiasts.

Geological facts

Red Jasper has been used since antiquity as a protector and healer. It was famously mentioned in biblical texts and was used by ancient Egyptians for amulets and seals. It is the opaque variety of chalcedony.

Field identification & locations

Identify in the field by its deep red color, extreme hardness (won't be scratched by steel), and smooth, conchoidal fracture. Found worldwide in locations like India, Brazil, USA (Western states), and South Africa. Collectors look for uniform color or unique patterns.

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