sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Dull to vitreous, Crystal structure: Microcrystalline/Cryptocrystalline, Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91

Hardness: 6

Identified May 9, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the accumulation of volcanic ash or silica-rich sediments in an oxygen-rich environment where iron oxides develop. Often found in hydrothermal veins and ancient seafloor deposits spanning several geological eras.

Uses & applications

Commonly used as a gemstone for jewelry (cabochons, beads), decorative ornaments, stone carvings, and it is a popular specimen for rock tumbling and metaphysical collections.

Geological facts

Jasper is an opaque variety of chalcedony. The red color is specifically caused by high concentrations of iron inclusions. Historically known as a stone of endurance and nurturing.

Field identification & locations

Identify by its opaque nature (light will not pass through the edges), its deep red color, and its hardness (it can scratch glass). Commonly found in riverbeds and desert environments in regions like India, Brazil, and the Southwestern USA.