sedimentary

Red Jasper

Chalcedony (SiO2) with iron inclusions

AI-generated identification · may be incorrect

Hardness: 6.5–7 (Mohs scale), Color: Brick-red to deep terracotta, Luster: Vitreous to dull, Crystal structure: Hexagonal (trigonal microcrystalline), Cleavage: None (conchoidal fracture), Specific gravity: 2.58–2.91

Hardness: 6

Identified March 26, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica in hydrothermal veins or sedentary volcanic environments; the red color is caused by the inclusion of iron oxide (hematite) during formation. It can occur in deposits spanning various geological ages.

Uses & applications

Commonly used for lapidary work, jewelry (cabochons and beads), decorative ornaments, and widely collected for its association with metaphysical grounding properties.

Geological facts

Jasper was a favorite gem in ancient times and is even mentioned in the Bible as a stone in the Breastplate of Aaron. It has been used for seals, amulets, and architectural decoration for thousands of years.

Field identification & locations

Identify in the field by its opaque reddish appearance and conchoidal fracture (smooth, curved breaks). Found globally in locations such as India, South Africa, Brazil, and the Southwestern US. Collectors should look for vibrant colors and minimal pitting.