sedimentary

Red Jasper

Silicon Dioxide with Hematite (SiO2 + Fe2O3)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Terracotta red to deep brownish-red; Luster: Vitreous to dull; Structure: Microcrystalline/cryptocrystalline (trigonal); Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Terracotta red to deep brownish-red
Luster: Vitreous to dull

Identified June 9, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed via the deposition of silica-rich fluids in cracks or volcanic cavities, where iron oxide (Hematite) inclusions provide the red pigment. It is often found in prehistoric sedimentary formations.

Uses & applications

Widely used for lapidary work, jewelry (cabochons, beads), decorative ornaments, and as a popular pocket stone for collectors.

Geological facts

Known historically as the 'supreme nurturer,' Red Jasper has been used since antiquity in seals, amulets, and ring stones across Egyptian and Roman civilizations.

Field identification & locations

Identify by its opaque red color and high hardness (it cannot be scratched by a steel knife). Commonly found in riverbeds or coastal areas in India, Brazil, USA, and South Africa. Look for a smooth, waxy surface when tumbled.