sedimentary

Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Brown/Ochre; Luster: Vitreous to waxy; Crystal Structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brown/Ochre
Luster: Vitreous to waxy

Identified July 5, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Brown/Ochre; Luster: Vitreous to waxy; Crystal Structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the infiltration of silica-rich fluids into volcanic ash or fine sedimentary clays. Often associated with ancient volcanic hydrothermal environments or marine sediments.

Uses & applications

Used primarily as a gemstone for jewelry, lapidary arts, decorative gravel, and as a healing stone in metaphysical communities.

Geological facts

Jasper is a variety of chalcedony that is opaque due to high mineral content. Brown jasper specifically is often referred to as 'Egyptian Marble' or 'Mud Jasper' depending on the pattern.

Field identification & locations

Identify in the field by its opaque nature (unlike agate), smooth conchoidal fracture, and high hardness. Common in riverbeds, beaches, and desert plains globally.