mineral

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Hardness: 6.5 to 7 on Mohs scale. Color: reddish-brown to deep brick-red. Luster: vitreous to waxy. Crystal Structure: trigonal (microcrystalline/cryptocrystalline). Cleavage: none, shows conchoidal fracture. Specific Gravity: 2.58 - 2.91.

Hardness: 6
Color: reddish-brown to deep brick-red
Luster: vitreous to waxy

Identified July 23, 2026More mineral →

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Physical properties

Formation & geological history

Formed when microcrystalline silica (quartz/chalcedony) precipitates in hydrothermal veins or sedimentary deposits, integrating fine particles of hematite or other iron oxides that give it its distinctive red color.

Uses & applications

Used widely for lapidary work, cabochons, beads, ornamental carvings, polished stones, and decorative landscaping.

Geological facts

Red jasper gets its rich reddish tone specifically from trace amounts of iron impurity (hematite). Ancient civilizations often used red jasper for amulets, seals, and protective talismans.

Field identification & locations

Identify by its opaque red color, waxy to vitreous dull shine, high hardness (cannot be scratched by a steel nail), and smooth conchoidal fracture. Commonly found in river beds, gravel deposits, and volcanic terrains worldwide.

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