sedimentary

Red Jasper

Silicon dioxide (SiO2) with iron oxide impurities

Hardness: 6.5-7 (Mohs); Color: Brick red to brownish red; Luster: Vitreous to waxy (when polished); Crystal Structure: Hexagonal (trigonal microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

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

Identified July 11, 2026More sedimentary →

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Physical properties

Formation & geological history

Red jasper is a microcrystalline variety of quartz. It forms primarily in sedimentary environments where silica-rich fluids permeate porous rock or volcanic ash, with the red hue provided by the presence of iron oxide (hematite) during formation.

Uses & applications

Used widely in lapidary work for cabochons, beads, and carvings. Also utilized in ornamental items, mosaics, and as a popular stone for tumbling and collectors.

Geological facts

Jasper is known as the 'Supreme Nurturer.' It has been used for millennia; ancient Egyptians used red jasper in amulets to enhance fertility and protection. Banded varieties, like this polished specimen, often show historical layers of sedimentation.

Field identification & locations

Identify by its deep red, opaque color and smooth, waxy feel when polished. It cannot be scratched by a steel knife. Common locations include Brazil, India, South Africa, and the southwestern United States.

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