mineral

Red Jasper

Silicon dioxide (SiO2) with iron oxide impurities

Hardness: 6.5-7 (Mohs scale), Color: brick red to brownish red, Luster: vitreous to waxy, Crystal Structure: Trigonal (microcrystalline), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.91

Hardness: 6

Identified January 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed via the deposition of silica from hydrothermal solutions or volcanic ash into sedimentary environments; red color arises from iron inclusions (hematite). Many specimens date from the Precambrian or later eras.

Uses & applications

Extensively used in lapidary work, jewelry (beads, cabochons), ornamental seals, and as a component in construction aggregates or architectural decoration.

Geological facts

Known as the 'Supreme Nurturer' in metaphysical traditions, Red Jasper has been used since antiquity; it was notably mentioned in biblical texts as part of the Breastplate of Aaron.

Field identification & locations

Identified in the field by its opaque brick-red color, extreme hardness (scratched by steel only with difficulty), and smooth river-worn texture when found in alluvial deposits. Common in areas of volcanic activity or ancient seabed deposits.

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