sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

AI-generated identification · may be incorrect

Hardness: 6.5–7 on Mohs scale; Color: Red to brownish-red; Luster: Dull to vitreous; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58–2.91

Hardness: 6
Color: Red to brownish-red
Luster: Dull to vitreous

Identified April 6, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the deposition of silica in hydrothermal veins or as sedimentary deposits where iron oxide provides the red pigmentation. It often forms through the alteration of volcanic ash or silicification of organic matter.

Uses & applications

Used primarily in jewelry (cabochons, beads), decorative carvings, lapidary arts, and as an ornamental stone in landscaping.

Geological facts

Jasper has been used as a gemstone since antiquity. In many cultures, red jasper was known as the 'stone of endurance' and was believed to provide protection to warriors and explorers.

Field identification & locations

Identify by its rich red color, waxy feel, and inability to be scratched by a steel knife. It is commonly found in river beds or areas with volcanic history such as India, Brazil, and the Southwestern United States.