mineral

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Hardness: 6.5-7.0 (Mohs scale). Color: Brick red to brownish-red. Luster: Vitreous to dull/earthy. Crystal structure: Trigonal/Microcrystalline. Cleavage: None (conchoidal fracture). Specific gravity: 2.58-2.91.

Hardness: 6
Color: Brick red to brownish-red
Luster: Vitreous to dull/earthy

Identified March 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica from hydrothermal solutions or in sedimentary environments. Its red color is derived from iron (hematite) inclusions within the cryptocrystalline quartz structure. Can be found in geological formations dating back millions of years.

Uses & applications

Primary use is in jewelry (cabochons, beads), decorative ornaments, stone carvings, and lapidary art. It is also highly popular among crystal collectors and for its purported metaphysical properties.

Geological facts

Jasper is an opaque variety of chalcedony. The name 'jasper' is derived from the Greek 'iaspis', meaning 'spotted stone'. It was highly valued in the ancient world, mentioned in biblical texts and used by ancient Egyptians for amulets.

Field identification & locations

Identify by its solid red color, high hardness (cannot be scratched by a steel knife), and smooth, waxy surface when polished. Common locations include India, Brazil, South Africa, and the southwestern United States (Arizona/Utah).

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