sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Dull to vitreous when polished; Crystal Structure: Hexagonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish-red
Luster: Dull to vitreous when polished

Identified March 3, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from water or hydrothermal fluids into cracks or cavities in other rocks. Its red color comes from iron (hematite) inclusions. It can form in various geological ages from the Precambrian to the present.

Uses & applications

Commonly used in lapidary work for jewelry (cabochons, beads), decorative objects, seals, and as a healing stone in spiritual practices. Historically used for ornaments and tools.

Geological facts

Known as the "Stone of Endurance," red jasper was used by ancient various civilizations, including Egyptians and Native Americans, for protection and strength. It is a microcrystalline variety of quartz.

Field identification & locations

Identify in the field by its deep red color, opaque transparency, and smooth, waxy surface when weathered. It is commonly found globally, notably in India, Brazil, the USA (Southwest), and South Africa.

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