mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish red; Luster: Vitreous to dull; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (Conchoidal fracture); SG: 2.58-2.91

Hardness: 6
Color: Brick red to brownish red
Luster: Vitreous to dull

Identified March 3, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish red; Luster: Vitreous to dull; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (Conchoidal fracture); SG: 2.58-2.91

Formation & geological history

Formed through the infiltration of silica-rich fluids into volcanic or sedimentary rocks, where iron oxides (hematite) provide the red pigment. It is a variety of chalcedony.

Uses & applications

Used primarily for lapidary work, jewelry (cabochons and beads), ornamental items, and as a popular collected specimen for its metaphysical associations.

Geological facts

Ancient Egyptians often wore red jasper amulets to represent the blood of Isis. It is known for its extreme opacity compared to other forms of translucent chalcedony.

Field identification & locations

Identify by its opaque red color, smoothness when tumbled, and inability to be scratched by a steel knife. Commonly found in South Africa, Brazil, India, and the USA.