mineral

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide impurities), SiO2

Hardness: 6.5-7 (Mohs scale); Color: Brick red to deep terracotta; Luster: Dull to Vitreous (waxy when polished); Crystal Structure: Hexagonal (Microcrystalline); Cleavage: None (Conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to deep terracotta
Luster: Dull to Vitreous (waxy when polished)

Identified March 16, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica from hydrothermal solutions or volcanic ash, often in sedimentary environments or volcanic cracks. The red color is caused by the inclusion of hematite (iron oxide). It can be found in formations ranging from the Precambrian to recent times.

Uses & applications

Commonly used in jewelry (beads, cabochons), ornamental carvings, stone inlays, and as a popular specimen for metaphysical or gemstone collectors.

Geological facts

In antiquity, Red Jasper was known as the 'rain bringer' and was frequently mentioned in historical texts as a stone of endurance and courage. It is an opaque variety of chalcedony.

Field identification & locations

Identify in the field by its deep red color, opacity (does not let light through even at the edges), and extreme hardness—it will easily scratch glass. Commonly found in riverbeds or desert regions in India, Brazil, USA (Southwest), and South Africa. Collectors should look for uniform color and lack of large fractures.

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