sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Hardness: 6.5–7 on Mohs scale; Color: Red due to iron inclusions; Luster: Dull to vitreous; Crystal Structure: Trigonal (microcrystalline quartz); Cleavage: None; Specific Gravity: 2.58–2.91

Hardness: 6
Color: Red due to iron inclusions
Luster: Dull to vitreous

Identified April 11, 2026More sedimentary →

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Physical properties

Hardness: 6.5–7 on Mohs scale; Color: Red due to iron inclusions; Luster: Dull to vitreous; Crystal Structure: Trigonal (microcrystalline quartz); Cleavage: None; Specific Gravity: 2.58–2.91

Formation & geological history

Formed from the deposition of silica-rich fluids in volcanic or sedimentary environments. Its red color comes from iron oxide (hematite) impurities integrated during formation, often millions of years old.

Uses & applications

Used primarily as a gemstone in jewelry, for lapidary work (cabochons), as an ornamental stone, and in spiritual/metaphysical collections.

Geological facts

Jasper was a favorite gemstone in the ancient world, mentioned in biblical texts and used by early civilizations for seals and talismans. It is an opaque variety of chalcedony.

Field identification & locations

Identify by its waxy to dull luster, lack of transparency, and high hardness (it cannot be scratched by a steel knife). Commonly found in river beds, beaches, and desert areas worldwide.