sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)

Hardness: 6.5–7 on Mohs scale; Color: Deep red to brownish-red; Luster: Vitreous to dull; Crystal Structure: Microcrystalline trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58–2.91

Hardness: 6
Color: Deep red to brownish-red
Luster: Vitreous to dull

Identified April 24, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from water-rich environments or hydrothermal fluids, often in volcanic or sedimentary basins where iron oxide (hematite) provides the red pigmentation. Found in various geological ages from Precambrian to Cenozoic.

Uses & applications

Used primarily for gemstone cabochons, jewelry, decorative ornaments, mosaic work, and metaphysical collecting. Historically used for making tools due to its conchoidal fracture.

Geological facts

Red Jasper has been used since antiquity in jewelry and sigils. It was known as the 'mother of all stones' by ancient civilizations and is mentioned in various historical texts across several cultures including Egyptian and Greek.

Field identification & locations

Identify by its opaque nature, smooth waxy surface when tumbled, and the presence of quartz-filled fractures or veins. Commonly found in river beds, deserts, and coastal areas near volcanic activity. Tools like a steel file shouldn't scratch it easily.

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