mineral

Possible chrysoprase or botryoidal chalcedony

Cryptocrystalline quartz, SiO₂; green color may result from nickel-bearing chalcedony

AI-generated identification · may be incorrect

Pale blue-green, irregular and locally botryoidal, with a waxy to dull luster; likely Mohs hardness 6.5–7, no visible cleavage, and conchoidal fracture. The image is insufficient to distinguish chrysoprase from common green chalcedony, turquoise, or weathered serpentine.

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Chalcedony forms when silica-rich fluids fill cavities and fractures, commonly in volcanic rocks; chrysoprase acquires its green color from nickel. Formation ages vary widely, from young weathering zones to ancient volcanic-hosted deposits.

Uses & applications

Attractive material may be cut for cabochons, beads, and ornamental objects; low-grade pieces are inexpensive lapidary rough. It has little construction or industrial use.

Geological facts

Chrysoprase is a valued green variety of chalcedony and can fade with prolonged heat or sunlight. Color and translucency are stronger value factors than crystal size.

Field identification & locations

Check translucency, waxy luster, conchoidal fracture, and hardness; a streak, specific-gravity test, and magnification help separate it from turquoise or serpentine. Notable deposits occur in Australia, Poland, Brazil, and the United States.