mineral

Chrysoprase-bearing quartz specimen (tentative)

Quartz (SiO₂) with nickel-bearing chalcedony/chrysoprase, possibly associated with host rock

AI-generated identification · may be incorrect

Appears pale gray-white and green, with a dull to vitreous luster and irregular, massive texture; quartz hardness is 7 Mohs, while chrysoprase is about 6.5–7. No reliable cleavage; specific gravity typically 2.6–2.7. The blurry image prevents confident identification.

Identified September 3, 2026More mineral →

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Physical properties

Formation & geological history

Chrysoprase forms when nickel-rich fluids alter silica in ultramafic rocks, commonly in fractures and weathering zones; quartz may crystallize alongside it. Deposits are generally Cenozoic to older, depending on locality.

Uses & applications

Attractive green material is used for cabochons, beads, carvings, and ornamental specimens; ordinary matrix has little industrial use.

Geological facts

The green color in chrysoprase comes mainly from dispersed nickel, not chromium. Color can fade with prolonged heat or strong sunlight.

Field identification & locations

Look for translucent apple-green chalcedony, waxy luster, conchoidal fracture, and hardness sufficient to scratch glass; distinguish it from dyed quartz or serpentine with gemological testing. Common sources include Australia, Brazil, Poland, and the United States.