sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

AI-generated identification · may be incorrect

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

Hardness: 6
Color: Brick red to brownish red
Luster: Dull to vitreous

Identified April 2, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from mineral-rich waters or volcanic ash, often in association with iron oxides that provide the red pigment. It is a microcrystalline variety of quartz.

Uses & applications

Commonly used in jewelry (beads, cabochons), lapidary arts, ornamental carvings, and historical use for seal stones and tools.

Geological facts

Red Jasper was known as a stone of endurance and protection in ancient Egypt and was famously one of the stones in the High Priest's Breastplate mentioned in the Bible.

Field identification & locations

Identify by its opaque red color, high hardness (will scratch glass), and waxy feel when polished. It often features dark streaks or vein-like patterns of hematite or magnetite.