mineral

Chrysoprase

Silicon dioxide (SiO2) with nickel impurities

Hardness: 6.5–7 on Mohs scale; Color: apple-green to dark green; Luster: Vitreous to waxy; Crystal structure: Hexagonal (cryptocrystalline); Specific gravity: 2.6

Hardness: 6
Color: apple-green to dark green
Luster: Vitreous to waxy

Identified May 18, 2026More mineral →

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Physical properties

Hardness: 6.5–7 on Mohs scale; Color: apple-green to dark green; Luster: Vitreous to waxy; Crystal structure: Hexagonal (cryptocrystalline); Specific gravity: 2.6

Formation & geological history

Formed as a result of the deep weathering or lateritization of nickeliferous serpentinite or other ultramafic rocks. It occurs as veins and nodules in these weathered zones.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads) and as an ornamental stone for carvings and decorative objects.

Geological facts

It is often mistaken for imperial jade. Unlike emerald, which owes its green color to chromium, chrysoprase owes its color to small inclusions of nickel minerals like kerolite or szymanskiite.

Field identification & locations

Identify by its waxy luster and distinct apple-green color. It is commonly found in Western Australia, Germany, Poland, Russia, Arizona, and Brazil.

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