sedimentary

Red 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; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

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

Identified May 6, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the deposition of silica from hydrothermal solutions or volcanic ash, followed by compaction and cementing. The red color is caused by the presence of iron (III) oxide.

Uses & applications

Primarily used for lapidary work, jewelry (cabochons, beads), decorative carvings, and as a healing stone in metaphysical practices.

Geological facts

Red Jasper has been used since antiquity for seals, amulets, and ornamentation. In ancient Egypt, it was associated with the blood of Isis and used in protective amulets.

Field identification & locations

Identify by its opaque nature (unlike Carnelian), matte luster when unpolished, and the ability to scratch glass. Found globally, notably in India, Brazil, USA, and South Africa.