mineral

Tumbled yellow-green chalcedony (likely chrysoprase or common chalcedony)

Microcrystalline quartz, SiO₂; chrysoprase is nickel-bearing chalcedony

AI-generated identification · may be incorrect

Hardness 6.5–7 Mohs; translucent pale yellow-green to honey-colored, waxy to vitreous luster, cryptocrystalline structure, no visible cleavage, and conchoidal fracture. The rounded surface indicates tumbling or natural abrasion.

Identified August 23, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich groundwater fills cavities and fractures, often in volcanic rocks; chrysoprase obtains its green color from nickel. Chalcedony deposits range from ancient to recent and occur worldwide.

Uses & applications

Used for beads, cabochons, carvings, and inexpensive decorative stone; larger pieces may serve as ornamental material. It is not typically used as a major construction aggregate.

Geological facts

The image cannot reliably distinguish chrysoprase from pale common chalcedony, dyed quartz, or serpentine without tests. Color, translucency, and waxy luster are suggestive but not diagnostic.

Field identification & locations

Common localities include Australia, Brazil, Madagascar, India, and the United States. Check for glassy conchoidal fracture, hardness against steel, and lack of fizz in acid; laboratory testing or specific gravity is needed for confirmation.