sedimentary

Red Jasper

Quartz (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: Red to brownish-red with yellowish patches, Luster: Vitreous to dull, Crystal structure: Trigonal (microcrystalline/cryptocrystalline), Fracture: Conchoidal, Specific Gravity: 2.58–2.91

Hardness: 6

Identified June 5, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed primarily as a result of the deposition of silica from volcanic fluids or in sedimentary environments where hydrothermal activity replaces organic matter or other minerals with silica. Its red color is derived from iron impurities.

Uses & applications

Commonly used as a gemstone for jewelry (cabochons, beads), decorative ornaments, metaphysical healing stones, and historically for tools and seals.

Geological facts

Jasper is an opaque variety of chalcedony. It has been used since antiquity, notably appearing in the breastplate of the High Priest in Biblical descriptions and as a favorite gemstone in the ancient world.

Field identification & locations

Identified in the field by its opacity (even on thin edges), its hardness (will scratch glass), and its smooth, waxy fracture surface. It is commonly found globally, with significant deposits in India, Brazil, and the USA.