mineral

Yellow Jasper

Silicon Dioxide (SiO2) - Chalcedony variety

Hardness: 6.5 - 7 on Mohs scale. Color: Mustard yellow, tan, brown with mottled patterns. Luster: Vitreous to waxy (smooth polished polish). Crystal structure: Microcrystalline (trigonal). Cleavage: None, exhibits conchoidal fracture.

Hardness: 6
Color: Mustard yellow, tan, brown with mottled patterns
Luster: Vitreous to waxy (smooth polished polish)

Identified July 23, 2026More mineral →

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Physical properties

Formation & geological history

Formed when silica-rich fluids deposit in volcanic or sedimentary environments, incorporating iron oxide impurities that produce the characteristic yellow and tan coloration.

Uses & applications

Used extensively for tumbled stones, beads, cabochons, carvings, decorative objects, and crystal healing practices.

Geological facts

Yellow Jasper has been used since antiquity as an ornamental stone. Its opaque color comes from microscopic inclusions of goethite or iron oxides within the quartz matrix.

Field identification & locations

Identified by its rich opaque tan-yellow color, high hardness, lack of transparency, and smooth waxy finish when tumbled. Common worldwide in jasper-bearing regions such as Madagascar, South Africa, and Brazil.

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