mineral

Jasper

Chalcedony (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale. Color: Highly variable, often red, yellow, brown, or green due to iron inclusions. Luster: Vitreous to dull. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.5-2.9.

Hardness: 6
Luster: Vitreous to dull

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Forms from the deposition of silica-rich waters in sedimentary or volcanic environments. Often replaces other materials like wood or forms in nodules.

Uses & applications

Commonly used as a gemstone in jewelry, for ornamental carvings, and in lapidary arts.

Geological facts

Jasper is an opaque variety of chalcedony. The name 'jasper' means 'spotted or speckled stone'.

Field identification & locations

Identified by its opacity, hardness, and often striking patterns or colors. Commonly found worldwide, with notable deposits in the US, Russia, India, and Madagascar.