sedimentary

Red Jasper

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific gravity: 2.58-2.91

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

Identified April 15, 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 dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific gravity: 2.58-2.91

Formation & geological history

Formed when fine particulate materials (silica) are deposited in hydrothermal vents or sedimentary environments. The red color comes from iron inclusions (hematite). It can be found in formations ranging from the Precambrian to modern eras.

Uses & applications

Used primarily in jewelry (beads, cabochons), ornamental carvings, and as a 'healing stone' in metaphysical practices. Historically used for making tools and seals.

Geological facts

Jasper has been a favorite gemstone in the ancient world; it is mentioned in numerous historical texts including the Bible and was frequently used in ancient Babylonian and Egyptian ornaments.

Field identification & locations

Identify by its opaque red color, high hardness (cannot be scratched by a knife), and smooth, conchoidal fracture when broken. Found globally, especially in areas with significant iron deposits like India, Brazil, and the USA.