Mineral

Red Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz with iron inclusions

Hardness: 6.5-7 on the Mohs scale. Color: Brick red to brownish red due to iron oxide impurities. Luster: Vitreous to dull. Crystal structure: Hexagonal (trigonal) microcrystalline. Cleavage: None (conchoidal fracture). Specific Gravity: 2.58-2.91.

Hardness: 6
Color: Brick red to brownish red due to iron oxide impurities
Luster: Vitreous to dull

Identified March 14, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich fluids within fissures and cavities in volcanic or sedimentary rocks. The red coloring is caused by the oxidation of iron within the silica. It can range from Precambrian to modern formations.

Uses & applications

Commonly used in lapidary work for jewelry, cabochons, and decorative carvings. Historically used for making tools and seals, and currently popular for 'healing' stones and collecting.

Geological facts

Jasper was a favorite gem in the ancient world, mentioned in the Bible and used by ancient Egyptians for amulets. It is known as the 'Supreme Nurturer' in metaphysical circles. Unlike many other stones, red jasper is opaque even in thin slices.

Field identification & locations

Identify in the field by its deep red color, high hardness (cannot be scratched by a steel blade), and smooth, waxy surface when polished. Found globally, with large deposits in India, Brazil, Madagascar, and the USA (California and Oregon).

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