sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Hardness: 6.5-7 on Mohs scale; Color: Terracotta red to brownish-red; Luster: Vitreous to dull; Crystal Structure: Microcrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Terracotta red to brownish-red
Luster: Vitreous to dull

Identified June 22, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Terracotta red to brownish-red; Luster: Vitreous to dull; Crystal Structure: Microcrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the deposition of silica from water-saturated environments or as a replacement mineral in volcanic ash and sedimentary deposits. It often contains iron inclusions which provide the red color.

Uses & applications

Commonly used in lapidary work, jewelry (beads, cabochons), ornamental carvings, and as a healing stone in metaphysical practices.

Geological facts

Jasper is an opaque variety of chalcedony. The name comes from the Greek word 'iaspis', meaning 'spotted stone'. It was one of the stones used in the breastplate of the High Priest in biblical times.

Field identification & locations

Identified by its deep red color, opacity (even on thin edges), and conchoidal fracture. Found worldwide, with significant deposits in India, Brazil, Madagascar, and the USA (southwestern states).