sedimentary

Red Jasper

Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Brick red to brownish-red; Luster: Vitreous to greasy; Crystal Structure: Microcrystalline/Trigonal (Chalcedony); Cleavage: None; Specific Gravity: 2.58-2.91.

Hardness: 6
Color: Brick red to brownish-red
Luster: Vitreous to greasy

Identified April 26, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Brick red to brownish-red; Luster: Vitreous to greasy; Crystal Structure: Microcrystalline/Trigonal (Chalcedony); Cleavage: None; Specific Gravity: 2.58-2.91.

Formation & geological history

Formed through the deposition of silica in sedimentary environments or hydrothermal veins. The red color is caused by iron inclusions that permeate the silica during its formation over millions of years.

Uses & applications

Used primarily in lapidary arts, jewelry (cabochons and beads), decorative carvings, and as a metaphysical grounding stone.

Geological facts

In antiquity, Red Jasper was known as the 'rain-bringer' and was used in amulets to protect against exhaustion or bad luck. It is an opaque variety of chalcedony.

Field identification & locations

Identify in the field by its deep red color, opacity (light will not pass through even thin edges), and conchoidal fracture. Commonly found in Brazil, India, USA, and South Africa.