sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Hardness: 6.5-7 Mohs; Color: Brick red to brownish-red; Luster: Dull to waxy; Structure: Microcrystalline quartz; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish-red
Luster: Dull to waxy

Identified July 12, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Brick red to brownish-red; Luster: Dull to waxy; Structure: Microcrystalline quartz; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the infiltration of silica in pockets of volcanic rock or in sedimentary deposits where iron oxide impurities provide the distinct red color. Geological age varies from hundreds of millions to billions of years.

Uses & applications

Used primarily in lapidary work for cabochons, beads, and carvings. Historically used for seals, amulets, and architectural decoration. Also popular in metaphysical collections.

Geological facts

Commonly known as the 'stone of endurance.' The red color is caused by high concentrations of iron. It is one of the many varieties of chalcedony.

Field identification & locations

Identify by its opaque nature (unlike agate which is translucent) and its rich red, earthy color. It can be found globally, particularly in areas with volcanic activity or ancient seabed deposits like the Western USA, Brazil, and India.