sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish-red
Luster: Vitreous to waxy

Identified June 21, 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 (Mohs); Color: Brick red to brownish-red; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91

Formation & geological history

Formed from the consolidation of fine-grained silica-rich sediments or volcanic ash. The red color is caused by iron (hematite) inclusions during the formation in hydrothermal veins or sedimentary beds.

Uses & applications

Commonly used in lapidary for making cabochons, beads, and decorative ornaments. It is also used as a grounding stone in metaphysical practices and occasionally in jewelry as a semi-precious stone.

Geological facts

Jasper has been used throughout history; it is mentioned in ancient literature and was used by ancient civilizations for cylinder seals and amulets. The name is derived from the Greek word 'iaspis', meaning 'spotted stone'.

Field identification & locations

Identify by its opaque nature (it does not transmit light), high hardness, and earthy red color. It is commonly found in riverbeds and coastal areas globally, particularly in India, Brazil, and the USA.