mineral

Red Jasper

Silicon Dioxide (SiO2) - Chalcedony

Hardness: 6.5-7 Mohs; Color: Brick red to brownish red due to iron inclusions; Luster: Dull to vitreous; Crystal Structure: Trigonal (Microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish red due to iron inclusions
Luster: Dull to vitreous

Identified May 30, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Brick red to brownish red due to iron inclusions; Luster: Dull to vitreous; Crystal Structure: Trigonal (Microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed primarily from the deposition of silica from volcanic ash or hydrothermal solutions into cracks and cavities. Its red color comes from high concentrations of iron oxide (hematite) during the mineralization process.

Uses & applications

Commonly used as a gemstone for jewelry (cabochons), ornamentation, lapidary art, and historically for tools and seals.

Geological facts

Red Jasper is known as a stone of endurance. In ancient times, it was considered a sacred stone of protection for shamans and warriors. Its solid, opaque nature distinguishes it from other translucent forms of chalcedony.

Field identification & locations

Identify by its deep red color, opacity, and smooth, conchoidal fracture when broken. It is a common find in river beds and gravel pits, especially in volcanic regions of India, Brazil, and the Southwestern USA.