sedimentary

Red Jasper

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Brick red to brownish-red; Luster: Dull to vitreous (waxy when polished); Crystal Structure: Microcrystalline/Trigonal; Opaque transparency.

Hardness: 6
Color: Brick red to brownish-red
Luster: Dull to vitreous (waxy when polished)

Identified July 9, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Brick red to brownish-red; Luster: Dull to vitreous (waxy when polished); Crystal Structure: Microcrystalline/Trigonal; Opaque transparency.

Formation & geological history

Formed through the deposition of silica from hydrothermal solutions or volcanic ash, with high iron oxide inclusions providing the red color. Commonly found in sedimentary environments or as primary minerals in hydrothermal veins.

Uses & applications

Used primarily in lapidary arts for beads, cabochons, and tumbled stones. Also used historically for seals, vases, and as an ornamental stone in jewelry.

Geological facts

Red Jasper has been used since antiquity; it was known as the 'rain-bringer' in some cultures and was mentioned in various ancient texts as a stone of protection and strength.

Field identification & locations

Identify in the field by its deep red color, opacity (even on thin edges), and smooth conchoidal fracture. Commonly found in India, Brazil, USA, and South Africa.