sedimentary

Red Jasper

Chalcedony (SiO2 with iron oxide impurities)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Terracotta red to deep brick red; Luster: Dull to vitreous; Crystal structure: Microcrystalline/Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91

Hardness: 6
Color: Terracotta red to deep brick red
Luster: Dull to vitreous

Identified April 6, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the infiltration of silica-rich fluids into volcanic ash or fine-grained sedimentary rock, often in oceanic environments. The red color comes from iron oxide (hematite) inclusions incorporated during formation.

Uses & applications

Used primarily for lapidary work, jewelry (cabochons), ornamental carvings, stone seals, and as an grounding stone in metaphysical practices.

Geological facts

Jasper is an opaque variety of chalcedony. In ancient times, red jasper was known as the 'blood of Mother Earth' and was used in ancient Egypt for amulets and jewelry to symbolize vitality.

Field identification & locations

Identify by its deep red color, opacity (it will not let light through even at the edges), and smooth, shell-like fracture pattern. Commonly found in Arizona (USA), India, Brazil, and South Africa.