sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Trigonal (Microcrystalline), Cleavage: None, Specific Gravity: 2.58-2.91

Hardness: 6

Identified July 6, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Trigonal (Microcrystalline), Cleavage: None, Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the deposition of silica in sedimentary environments or hydrothermal veins, where iron oxide inclusions provide the distinct red coloration. Found in ancient volcanic deposits and sedimentary beds.

Uses & applications

Widely used as a gemstone for jewelry, carvings, ornaments, and pocket stones. Historically used for making tools and seals.

Geological facts

Red Jasper has been a sacred stone across many cultures; it was known as the 'rain-bringer' in some Native American traditions and was used in the breastplate of the High Priest in Biblical times.

Field identification & locations

Identify by its opaque red color and high hardness (it will scratch glass). Commonly found in riverbeds or coastal areas in India, Brazil, USA, and South Africa.