sedimentary

Red Jasper

Silicon Dioxide (SiO2) containing Iron Oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Dull or waxy, Crystal Structure: Trigonal (microcrystalline), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.6-2.9

Hardness: 6

Identified June 4, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Dull or waxy, Crystal Structure: Trigonal (microcrystalline), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.6-2.9

Formation & geological history

Formed primarily as a result of the deposition of silica from volcanic ash or water in sedimentary environments. Its red color is derived from high iron oxide content trapped during chemical precipitation.

Uses & applications

Commonly used as a gemstone for jewelry (cabochons), or for industrial purposes like abrasive grit, and as a popular specimen for rock tumbling and metaphysical collections.

Geological facts

Red Jasper has been used since antiquity; it was known as the 'mother of all stones' in some cultures and was used by ancient Egyptians for amulets and jewelry to symbolize the blood of Isis.

Field identification & locations

Identify by its deep red color, characteristic conchoidal fracture patterns, and durability (it will easily scratch glass). It is commonly found in riverbeds or desert regions world-wide.