sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Brick red with occasional quartz veining; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91

Hardness: 6
Color: Brick red with occasional quartz veining
Luster: Vitreous to dull

Identified June 2, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed via the deposition of silica from water into subterranean cavities or during the metamorphism of organic-rich sediments or volcanic ash. The red color is caused by iron (hematite) inclusions incorporated during the solidification process.

Uses & applications

Commonly used as a gemstone for jewelry, in lapidary work for cabochons and tumbled stones, and as decorative architectural accents or stone carvings.

Geological facts

Red Jasper has been used since antiquity as a 'warrior's stone' for protection. It is a dense, opaque variety of chalcedony that is valued for its deep, rich color and ability to take a high polish.

Field identification & locations

Identifiable in the field by its opacity (unlike translucent carnelian), lack of cleavage, and resistance to scratching steel. Often found in riverbeds, desert pavements, and near iron-rich volcanic deposits.