sedimentary

Red Jasper

Silicon Dioxide (SiO2)

Hardness: 6.5-7 Mohs; Color: Brick red to deep brownish-red; Luster: Vitreous to dull; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to deep brownish-red
Luster: Vitreous to dull

Identified June 19, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Brick red to deep brownish-red; Luster: Vitreous to dull; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed from the deposition of silica-rich volcanic ash or fine-grained sediments where iron inclusions provide the red color. Typically found in hydrothermal veins or as nodules in sedimentary rocks.

Uses & applications

Commonly used as a gemstone for jewelry (cabochons), or for ornamental carvings, worry stones, and as a decorative stone in landscaping.

Geological facts

Jasper has been used as a gemstone since antiquity; it was mentioned in the Bible and used by Ancient Egyptians in amulets. It is known as the 'Supreme Nurturer' in metaphysical circles.

Field identification & locations

Identify by its opaque red color and smooth, conchoidal fracture. Unlike other stones, it does not allow light to pass through. Commonly found in riverbeds or gravel pits in regions with volcanic history.