sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with impurities, microcrystalline quartz

Hardness: 6.5 to 7 on the Mohs scale; Color: Yellow, brownish-yellow, or golden; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None (exhibits conchoidal fracture); Specific gravity: 2.58 to 2.91

Hardness: 6
Color: Yellow, brownish-yellow, or golden
Luster: Vitreous to dull

Identified July 31, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition and consolidation of silica-rich sediments or the silicification of other rock types in sedimentary environments, often associated with hydrothermal activity or volcanic ash beds.

Uses & applications

Used primarily in lapidary arts for making cabochons, beads, carvings, and ornamental decorative objects, as well as valued by collectors.

Geological facts

Jasper has been used since ancient times for talismans, seals, and jewelry. The yellow variety is often associated with vitality and grounding properties in metaphysical traditions.

Field identification & locations

Identified by its opaque yellow color, waxy-to-vitreous luster, and conchoidal fracture. Commonly found in riverbeds, desert environments, and areas with ancient volcanic or hydrothermal activity worldwide.

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