mineral

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7.0 (Mohs scale), Color: Red to brownish-red, Luster: Vitreous to dull, Crystal structure: Trigonal/Microcrystalline, Cleavage: None, Specific gravity: 2.58-2.91

Hardness: 6

Identified June 28, 2026More mineral →

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Physical properties

Hardness: 6.5-7.0 (Mohs scale), Color: Red to brownish-red, Luster: Vitreous to dull, Crystal structure: Trigonal/Microcrystalline, Cleavage: None, Specific gravity: 2.58-2.91

Formation & geological history

Formed via the deposition of silica from hydrothermal solutions or in sedimentary environments. Its red color is derived from iron (hematite) inclusions within the silica matrix.

Uses & applications

Used in lapidary work, jewelry (beads, cabochons), ornamental carvings, and historically as gemstones and seals.

Geological facts

Red Jasper was known as the 'stone of endurance' in ancient cultures and has been used for thousands of years in jewelry and protective amulets. It is a variety of chalcedony.

Field identification & locations

Check for a conchoidal (shell-like) fracture and high hardness (cannot be scratched by a steel knife). Look for a dull to waxy luster and opaque red appearance. Found globally in deserts and riverbeds.