sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7.0 (Mohs). Color: Opaque brick red to maroon. Luster: Vitreous to dull. Crystal system: Hexagonal (microcrystalline). Cleavage: None, exhibits conchoidal fracture.

Hardness: 6
Color: Opaque brick red to maroon
Luster: Vitreous to dull

Identified June 9, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7.0 (Mohs). Color: Opaque brick red to maroon. Luster: Vitreous to dull. Crystal system: Hexagonal (microcrystalline). Cleavage: None, exhibits conchoidal fracture.

Formation & geological history

Formed from microcrystalline fibrous quartz. The red color is derived from iron (hematite) inclusions within the silica structure during hydrothermal processes or sedimentary diagenesis.

Uses & applications

Commonly used as a gemstone, in lapidary work for carvings/cabochons, and as a decorative stone in jewelry and interior design. Historically used for seals and amulets.

Geological facts

Red Jasper is known as a stone of endurance and was reportedly used in the breastplate of the High Priest in biblical times. It is the red variety of Chalcedony.

Field identification & locations

Identify by its deep red color and waxy to smooth texture when broken. It will not scratch easily with a knife. Found globally, especially in river beds or areas with volcanic activity.