sedimentary

Red Jasper (Brecciated 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 with white/gray quartz veins; Luster: Dull to Vitreous; Crystal Structure: Hexagonal (Trigonal) microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish-red with white/gray quartz veins
Luster: Dull to Vitreous

Identified May 26, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from hydrothermal solutions or volcanic ash in sedimentary environments, with iron inclusions providing the red color. Often fractured and rehealed with quartz (brecciated).

Uses & applications

Used primarily for lapidary work, jewelry (cabochons and beads), decorative ornaments, and as a popular specimen for rock collectors and metaphysical use.

Geological facts

Jasper has been used as a gemstone since antiquity; it was known as the 'mother of all stones' in some ancient cultures and is frequently found in archaeological sites as seals or carvings.

Field identification & locations

Identify by its opacity, characteristic red color, and ability to scratch glass. It is commonly found in gravel beds, desert plains, and volcanic regions globally.