sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

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

Hardness: 6
Color: Brick red to brownish-red
Luster: Dull to vitreous

Identified July 4, 2026More sedimentary →

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Physical properties

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

Formation & geological history

Jasper is a variety of chalcedony that forms when silica-rich fluids permeate through volcanic ash or sedimentary rocks. The red color is caused by the presence of iron oxide (hematite) inclusions during the solidification process.

Uses & applications

Used primarily in jewelry (cabochons, beads), decorative carvings, and as a popular stone for tumbling and collecting. Historically used for seals and physical protection amulets.

Geological facts

Red Jasper was known as the 'stone of endurance' in ancient times. It was also referred to as the 'blood of Mother Earth' by various indigenous cultures due to its deep red hue.

Field identification & locations

Identified by its opaque nature (it does not transmit light even at the edges), its deep red color, and its smooth, waxy feel when polished. Widely found in gravel pits, riverbeds, and desert regions globally.