sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) impurities

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Dull or waxy when raw, vitreous when polished; Crystal Structure: Microcrystalline/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish-red
Luster: Dull or waxy when raw, vitreous when polished

Identified March 11, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich sediments or volcanic ash that undergo diagenesis. The intense red color is caused by the inclusion of iron oxide (hematite) during its original formation millions of years ago, often found in hydrothermal veins or as nodules in sedimentary rocks.

Uses & applications

Commonly used in lapidary work for making cabochons, beads, and carvings for jewelry. It is also used as a decorative stone in landscaping and has been used historically for seals and talismans.

Geological facts

Red Jasper was known as the 'Blood of Mother Earth' in some ancient cultures and was frequently used in the amulets of ancient Egyptians. It is an opaque variety of chalcedony.

Field identification & locations

Identify in the field by its opaque red color, smoothness, and conchoidal (shell-like) fracture patterns. It is found globally, with major deposits in India, Russia, Brazil, Germany, and the United States (Southwest region). Specimens can be found along riverbeds and in arid deserts.