sedimentary

Red Jasper

Silicon Dioxide (SiO2)

Hardness: 6.5 to 7 on the Mohs scale; Color: Reddish-brown due to iron inclusions; Luster: Dull to vitreous; Crystal Structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.6 to 2.9

Hardness: 6
Color: Reddish-brown due to iron inclusions
Luster: Dull to vitreous

Identified June 20, 2026More sedimentary →

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Physical properties

Hardness: 6.5 to 7 on the Mohs scale; Color: Reddish-brown due to iron inclusions; Luster: Dull to vitreous; Crystal Structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.6 to 2.9

Formation & geological history

Jasper is an opaque variety of chalcedony formed through the deposition of silica from water. Its red color is typically the result of iron oxidation occurring during the sedimentary or hydrothermal process.

Uses & applications

Commonly used as a gemstone for jewelry, in lapidary work for cabochons and beads, and as decorative stone in mosaics or as tumbled river rock.

Geological facts

Red Jasper is known as 'the stone of endurance' in metaphysical circles. Historically, it was used in ancient Egypt for amulets and in the jewelry of royalty and high priests.

Field identification & locations

Identify by its deep red color, smooth waxy texture when tumbled, and inability to be scratched by a steel knife. It is commonly found in riverbeds or as pebbles along coastlines and is widespread globally.