mineral

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Hardness: 6.5-7 Mohs; Color: Opaque red (due to iron inclusions); Luster: Vitreous to dull; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58–2.91

Hardness: 6
Color: Opaque red (due to iron inclusions)
Luster: Vitreous to dull

Identified March 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica from hydrothermal solutions or volcanic ash in sedimentary or metamorphic environments. Its red color comes from iron oxide (hematite) impurities present during the crystallization process.

Uses & applications

Commonly used in lapidary work for cabochons, beads, and tumbled stones. Also used for ornamental carvings, mosaics, and as a popular specimen for metaphysical or hobbyist collectors.

Geological facts

Red Jasper has been used since antiquity; it was known as the 'rain-bringer' in some Native American cultures and was frequently used in ancient Egypt for amulets and jewelry. It is a microcrystalline variety of quartz.

Field identification & locations

Identify in the field by its deep red, opaque color, lack of transparency (even on thin edges), and its high hardness (it will scratch glass). Commonly found in the USA (Oregon, Idaho), Brazil, Madagascar, and South Africa.