mineral

Yellow Quartz (Chalcedony)

Silicon Dioxide (SiO2)

Hardness: 6.5-7 on Mohs scale; Color: Pale yellow to honey-orange; Luster: Waxy to vitreous; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.6-2.64.

Hardness: 6
Color: Pale yellow to honey-orange
Luster: Waxy to vitreous

Identified March 24, 2026More mineral →

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Physical properties

Formation & geological history

Formed by the deposition of silica-rich fluids in volcanic cavities, sedimentary veins, or through the weathering of larger quartz crystals. This specimen appears water-worn, suggesting secondary transport in a river or stream bed.

Uses & applications

Used primarily for lapidary work (cabochons), jewelry, and as decorative stone ('tumble stones'). Also highly popular in the metaphysical and collecting communities as a solar plexus chakra stone.

Geological facts

When chalcedony displays this specific translucent yellow hue, it is often commercially labeled as 'Yellow Jasper' or 'Yellow Quartzite' despite being technically a microcrystalline quartz. It is extremely resistant to chemical weathering.

Field identification & locations

Identify by its waxy luster, translucency when held to light, and inability to be scratched by a steel knife. It is commonly found in gravel beds, beaches, and desert washes worldwide.