sedimentary

Red Jasper

Jasper (SiO2, Silicon Dioxide with Iron inclusions)

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red with occasional white or black streaks; Luster: Dull to Vitreous (glassy); Crystal Structure: Hexagonal (Microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Luster: Dull to Vitreous (glassy)

Identified January 22, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed via the deposition of silica from water or hydrothermal fluids, typically in cracks of volcanic rocks or sedimentary environments. Iron oxides precipitate during the process, giving the stone its characteristic red color.

Uses & applications

Primarily used in jewelry (beads, cabochons), carvings, and ornamental objects. Highly valued by collectors for its patterns and by some groups for its supposed metaphysical properties of stamina and grounding.

Geological facts

Red Jasper was a favorite in the ancient world; it is mentioned in the Bible as one of the stones in the High Priest's Breastplate and was used in ancient Egypt for amulets and protective jewelry.

Field identification & locations

Identify in the field by its deep red, opaque appearance and high resistance to scratching (it will scratch glass but not steel). Common locations include India, Brazil, Madagascar, and the Southwestern United States.

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