sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Hardness: 6.5-7 on Mohs scale; Color: Red, reddish-brown; Luster: Vitreous to dull; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91

Hardness: 6
Color: Red, reddish-brown
Luster: Vitreous to dull

Identified July 1, 2026More sedimentary →

Explore Red Jasper in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Red, reddish-brown; Luster: Vitreous to dull; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91

Formation & geological history

Formed through the infiltration of silica-rich fluids into volcanic ash or fine-grained sediments, frequently associated with iron oxides which provide the red color. Typically Proterozoic to Cenozoic in age.

Uses & applications

Used primarily for lapidary work, jewelry making (cabochons), interior decoration, and as a healing stone in spiritual practices.

Geological facts

Red Jasper is often referred to as the 'Supreme Nurturer'. Its red color is derived from high concentrations of hematite (iron) included within the quartz matrix.

Field identification & locations

Identify by its waxy to dull luster and its inability to be scratched by a steel knife. It is commonly found in riverbeds or as rounded cobbles in sedimentary deposits worldwide.