sedimentary

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2

Hardness: 6.5-7 (Mohs scale); Color: Brick red to deep brownish-red; Luster: Dull to vitreous; Crystal Structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to deep brownish-red
Luster: Dull to vitreous

Identified April 12, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from water-rich environments, often in volcanic ash or sedimentary beds. The red color is derived from high iron oxide (hematite) content during its formation over millions of years.

Uses & applications

Used widely in lapidary arts for cabochons, beads, and carvings; historically used for ornamental jewelry, amulets, and architectural inlays. Also popular as a decorative landscaping stone.

Geological facts

Red Jasper has been used since ancient times for its supposed protective qualities; it was known as the 'mother of all stones' in some cultures and was used in the seal of the Hebrew High Priest.

Field identification & locations

Identify by its opaque red color, smoothness when weathered, and lack of visible crystalline grain. It cannot be scratched by a steel knife. Common in diverse geological settings worldwide, especially in riverbeds or coastal areas.

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