sedimentary

Red Jasper (possibly Carnelian)

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Hardness: 6.5–7 (Mohs scale); Color: Opaque reddish-brown to bright red; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58–2.91

Hardness: 6
Color: Opaque reddish-brown to bright red
Luster: Vitreous to waxy

Identified March 20, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich fluids within volcanic rocks or sedimentary environments. Its deep red color comes from high concentrations of hematite (iron) inclusions distributed throughout the stone.

Uses & applications

Used widely in lapidary arts for cabochons, beads, and tumbled stones. Historically used for seals, amulets, and architectural inlay. It is a popular 'healing stone' in metaphysical communities.

Geological facts

Known as the 'Stone of Endurance' in ancient times; it was referenced in diverse cultures from the Vikings to the Egyptians as a protective amulet. It is technically an impure variety of silica.

Field identification & locations

Identify by its opaque nature (unlike Carnelian which is translucent), smooth waxy feel when polished, and high hardness (it will scratch glass). Commonly found in South Africa, Brazil, and the USA.

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