sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

AI-generated identification · may be incorrect

Hardness: 6.5–7 on Mohs scale. Color: Opaque terracotta red to brownish-red. Luster: Dull to vitreous (glossy) when polished. Crystal structure: Trigonal/Microcrystalline. Cleavage: None (conchoidal fracture). Specific Gravity: 2.58–2.91.

Hardness: 6
Color: Opaque terracotta red to brownish-red
Luster: Dull to vitreous (glossy) when polished

Identified March 20, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica-rich sediments or volcanic ash. Over millions of years, heat and pressure silica-saturate the substrate, while iron oxides (hematite) leech into the mineral to provide the deep red pigmentation. It can be found in sedimentary beds dating back to the Precambrian era.

Uses & applications

Primarily used for lapidary work, jewelry (cabochons and beads), ornamental or decorative carvings, and in the 'metaphysical' market as a grounding stone.

Geological facts

Jasper was a favorite gem in the ancient world; its name can be traced back in Hebrew, Assyrian, Persian, Greek, and Latin. Red Jasper is specifically mentioned in many ancient texts as a stone of protection and physical vitality.

Field identification & locations

Identify by its solid red color, inability to be scratched by a steel knife, and smooth, waxy feel when tumbled. Unlike Carnelian, Red Jasper is completely opaque. It is commonly found in India, Brazil, Madagascar, and the Southwestern USA.