mineral

Yellow Jasper

Silicon Dioxide (SiO2) with Iron Oxides

AI-generated identification · may be incorrect

Hardness: 6.5-7 on the Mohs scale; Color: Yellow, mustard, tan, reddish-brown; Luster: Waxy to vitreous; Crystal Structure: Microcrystalline (trigonal); Cleavage: None, conchoidal fracture; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Yellow, mustard, tan, reddish-brown
Luster: Waxy to vitreous

Identified July 27, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich thermal waters precipitate microcrystalline quartz within cavities or sedimentary deposits, absorbing iron oxide minerals (goethite/limonite) which give it its yellow hue.

Uses & applications

Used extensively for lapidary arts, tumbled stones, jewelry beads, cabochons, and decorative carvings.

Geological facts

Yellow Jasper has been used since antiquity for seals and amulets. It is believed by traditional practitioners to provide grounding and protective energies.

Field identification & locations

Identified by its opaque appearance, waxy polish, smooth surface, and resistance to scratching by a steel blade. Commonly found along riverbeds, beaches, and gravel deposits worldwide.