sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Ferric Iron inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs). Color: Opaque brick red to brownish-red. Luster: Vitreous to waxy (when polished). Crystal Structure: Trigonal/Microcrystalline. Cleavage: None (Conchoidal fracture). Specific Gravity: 2.58-2.91.

Hardness: 6
Color: Opaque brick red to brownish-red
Luster: Vitreous to waxy (when polished)

Identified May 3, 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

Formation & geological history

Formed through the deposition of silica from water sources which then undergoes crystallization into a microcrystalline structure. The red color is derived from iron impurities. It is often found in hydrothermal veins or as part of sedimentary deposits.

Uses & applications

Used primarily in lapidary work for cabochons, beads, and carvings. Historically used for ornaments, seals, and as a semi-precious gemstone in jewelry.

Geological facts

In ancient times, Red Jasper was known as a stone of endurance and was often carried by warriors to provide protection and strength. It is a variety of chalcedony.

Field identification & locations

Found worldwide, notably in India, Brazil, Russia, and the USA. Identified by its deep opaque red color and high hardness; it cannot be scratched by a steel pocket knife.