sedimentary

Red Jasper (River Smooth)

Silicon Dioxide (SiO2) with Hematite impurities

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Opaque brick red to brownish-red; Luster: Dull to waxy; Structure: Microcrystalline quartz; Cleavage: None (Conchoidal fracture)

Hardness: 6
Color: Opaque brick red to brownish-red
Luster: Dull to waxy

Identified July 19, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Opaque brick red to brownish-red; Luster: Dull to waxy; Structure: Microcrystalline quartz; Cleavage: None (Conchoidal fracture)

Formation & geological history

Formed from the consolidation of fine silicate materials or volcanic ash, often in hydrothermal environments or sedimentary beds. This specimen appears water-worn, indicating erosion and transport in a river or marine environment.

Uses & applications

Used primarily for lapidary arts, jewelry (cabochons and beads), ornamental carvings, and as a meditative or healing stone in alternative practices.

Geological facts

Red Jasper has been used since antiquity for royal seals and amulets. The red color is caused by iron (hematite) inclusions within the dense quartz matrix.

Field identification & locations

Identified by its deep red color, opacity, and smooth, rounded surface indicating water erosion. Collectors should look for its inability to be scratched by a steel knife.