sedimentary

Red Jasper

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7.0 (Mohs scale); Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Microcrystalline/Trigonal; Cleavage: None; Specific Gravity: 2.58-2.91

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

Identified April 9, 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: 6.5-7.0 (Mohs scale); Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Microcrystalline/Trigonal; Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed when fine silica-rich materials are deposited in sedimentary environments or through the replacement of organic matter. The red color is caused by iron (hematite) inclusions.

Uses & applications

Commonly used for lapidary work, jewelry, ornamental carvings, and as a decorative stone in landscaping.

Geological facts

Jasper is an opaque variety of chalcedony. It has been used since antiquity as a gemstone and for ritual tools in various cultures.

Field identification & locations

Identify by its rich red color, opacity, and smooth, waxy surface when polished. Commonly found in riverbeds and desert environments globally, including the USA, Brazil, and India.