sedimentary

Red Jasper

Silicon dioxide (SiO2) with Iron inclusions

AI-generated identification · may be incorrect

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

Hardness: 6
Color: Deep red to brownish-red
Luster: Dull to vitreous (waxy when polished)

Identified April 9, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich fluids in volcanic ash or sedimentary basins. The red color is caused by the inclusion of iron oxide (hematite) during the formation process millions of years ago.

Uses & applications

Used primarily as a gemstone for jewelry (cabochons), lapidary art, decorative carvings, and as a popular specimen for crystal collecting and metaphysical purposes.

Geological facts

In ancient times, Red Jasper was known as the 'stone of endurance' and was frequently used by warriors to decorate their weapons and breastplates for protection.

Field identification & locations

Identify in the field by its opaque nature (light does not pass through it), smooth conchoidal fractures, and distinct red color that does not scratch easily. Commonly found in riverbeds and arid regions globally, including India, Brazil, and the USA.