mineral

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Dull to vitreous when wet; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific gravity: 2.58-2.91

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

Identified April 26, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Dull to vitreous when wet; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific gravity: 2.58-2.91

Formation & geological history

Formed from silica-rich fluids (chalcedony) that permeate volcanic or sedimentary rocks, with the red color derived from iron oxide inclusions (hematite). Can be found in precambrian to modern deposits.

Uses & applications

Used primarily as decorative stone, gemstones for jewelry (cabochons, beads), lapidary work, and sometimes as an abrasive or in industrial quartz uses.

Geological facts

Jasper is an opaque variety of chalcedony. In ancient times, it was known as the 'supreme nurturer' and was worn by shamans and healers for protection. Each piece has a unique pattern based on how the impurities were trapped during silica deposition.

Field identification & locations

Identify by its opaque nature (it does not transmit light even on thin edges), its smooth conchoidal fracture, and it cannot be scratched by a steel knife. Frequently found on beaches and riverbeds where water has eroded and polished the stone.

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