mineral

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Hardness: 6.5-7 on Mohs scale; Color: Red, brown, earthy tones; Luster: Vitreous to waxy (tumbled); Crystal Structure: Hexagonal (Trigonal) microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Red, brown, earthy tones
Luster: Vitreous to waxy (tumbled)

Identified June 3, 2026More mineral →

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Physical properties

Formation & geological history

Formed in sedimentary or volcanic environments where silica-rich fluids permeate through rock cracks and deposit minerals over time. The red color is typically due to iron (hematite) inclusions during the crystallization process.

Uses & applications

Used extensively in jewelry as beads and cabochons, for ornamental carvings, and widely sold as tumbled pocket stones for collectors or spiritual practitioners.

Geological facts

Red Jasper has been used since ancient times for amulets and carvings; it is mentioned in various historical texts as a stone of endurance and strength. It is a variety of chalcedony.

Field identification & locations

Identify by its deep opaque red color and high hardness (cannot be scratched by a steel knife). Commonly found in riverbeds or gravel deposits globally, including significant deposits in India, Brazil, and the USA.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

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Epidote

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Nephrite Jade

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Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

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