sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Dull to vitreous when polished; Crystal Structure: Hexagonal (Trigonal), microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish-red
Luster: Dull to vitreous when polished

Identified April 29, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the accumulation of silica from either volcanic ash or cooling hydrothermal fluids. Its red color is derived from iron (hematite) inclusions that saturated the silica during the sedimentation process.

Uses & applications

Commonly used in lapidary work for making cabochons, beads, and decorative carvings. It is popular in jewelry and spiritual collections as a 'grounding' stone.

Geological facts

Jasper is an opaque variety of chalcedony. Historically, it was known as the 'supreme nurturer' and has been found in archaeological sites spanning thousands of years, from ancient Egypt to Minoan Crete.

Field identification & locations

Identify by its solid, opaque red color and smooth, conchoidal fracture. Unlike some other red stones, it will not scratch easily with a steel knife. It is ubiquitous globally, with major deposits in India, Brazil, and the USA.