sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Dull or waxy, Crystal Structure: Hexagonal (cryptocrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91

Hardness: 6

Identified June 14, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from silica-rich sedimentary deposits or volcanic ash where iron oxides (hematite) have been included during the silicification process. It is found in deposits ranging from Precambrian to more recent geological ages.

Uses & applications

Commonly used as a gemstone in jewelry (cabochons, beads), decorative carvings, and as an ornamental stone in landscaping. Historically used for making tools due to its hardness.

Geological facts

Red Jasper was known as the 'stone of endurance' in ancient cultures and was often used in Egyptian amulets. It gets its vibrant red color from high concentrations of iron oxide inclusion.

Field identification & locations

Identify by its opaque red color and high hardness (it cannot be scratched by a steel knife). Look for it in stream beds, gravel pits, and desert pavement. Collectors value pieces with unique patterns or deep, uniform color.