sedimentary

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Vitreous to dull; 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 dull

Identified April 11, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed by the precipitation of silica from volcanic fluids or in sedimentary deposits where iron oxides (hematite) are present. Often found in hydrothermal veins or as pebbles in river beds.

Uses & applications

Used primarily in jewelry (cabochons, beads), decorative ornaments, and as a focus for crystal healing practices. Occasionally used for building facade accents.

Geological facts

Jasper is an opaque variety of chalcedony. The red color specifically comes from iron impurities. It has been a popular gemstone since ancient times, mentioned in various mythologies and historical texts as a stone of endurance.

Field identification & locations

Identify by its rich red color, extreme hardness (will scratch glass), and opaque nature. It is commonly found in India, Brazil, USA, and South Africa. Collectors look for pieces with interesting patterns or high polish.