mineral

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Hardness: 6.5-7 on Mohs scale; Color: Deep red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

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

Identified May 1, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Deep red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed from volcanic ash or fine-grained silica settling in deep sea environments, later silica-enriched by hydrothermal circulation. The red color comes from iron oxide (hematite) impurities.

Uses & applications

Commonly used as a gemstone for cabochons, beads, and decorative carvings; also used in lapidary therapy and as an ornamental stone.

Geological facts

Jasper is an opaque variety of chalcedony. Historically, it was known as the 'supreme nurturer' and was worn by shamans for protection.

Field identification & locations

Identify by its deep red color, opacity (light will not pass through even thin edges), and its ability to scratch glass. Commonly found in riverbeds, beaches, and desert plains globally.

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Mineral/Rock

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mineral