sedimentary

Yellow Jasper

Silicon Dioxide (SiO2)

Hardness: 6.5-7 (Mohs scale), Color: Mustard yellow to golden brown, Luster: Vitreous to waxy, Crystal structure: Trigonal/Microcrystalline, Cleavage: None, Specific gravity: 2.58-2.91

Hardness: 6

Identified May 31, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale), Color: Mustard yellow to golden brown, Luster: Vitreous to waxy, Crystal structure: Trigonal/Microcrystalline, Cleavage: None, Specific gravity: 2.58-2.91

Formation & geological history

Formed through the accumulation of silica-rich fluids in volcanic or sedimentary environments, often associated with hydrothermal activity. Its color comes from iron silicate and goethite inclusions.

Uses & applications

Used primarily in jewelry (beads, cabochons), ornamental carvings, as a healing crystal, and as an industrial abrasive in some contexts.

Geological facts

Yellow Jasper was historically used as a stone of protection and was often referred to as a 'rain bringer.' It is a dense, opaque variety of chalcedony.

Field identification & locations

Identify by its waxy luster, conchoidal fracture, and opacity. Commonly found in riverbeds, desert environments, and volcanic deposits. Significant sources include India, Egypt, and the USA.