sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Deep Brick Red to Reddish-Brown; Luster: Vitreous to Waxy; Crystal Structure: Hexagonal (Microcrystalline); Cleavage: None (Conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Deep Brick Red to Reddish-Brown
Luster: Vitreous to Waxy

Identified July 12, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed by the precipitation of silica from groundwater or hydrothermal fluids into cracks or cavities in other rocks. Its red color is caused by the inclusion of iron oxide (hematite) during formation. Most jasper is from the Paleozoic or Cainozoic eras.

Uses & applications

Commonly used as a gemstone for jewelry (cabochons, beads), decorative carvings, polished stones for metaphysical use, and historically used for making tools and seals.

Geological facts

Red Jasper was known as the 'Mother of All Stones' in ancient Egypt and was associated with the fertility of Isis. It has been used for thousands of years as a stone of protection and strength.

Field identification & locations

Identify in the field by its opaque reddish appearance, high hardness (cannot be scratched by a steel knife), and its characteristic smooth, waxy luster when tumbled. Common locations include Brazil, India, USA, and South Africa.