mineral

Chrysoprase

Nickel-bearing Chalcedony (SiO2 with Ni impurities)

Hardness: 6.5-7.0 (Mohs); Color: Apple-green to deep green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.6

Hardness: 6
Color: Apple-green to deep green
Luster: Vitreous to waxy

Identified April 17, 2026More mineral →

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Physical properties

Hardness: 6.5-7.0 (Mohs); Color: Apple-green to deep green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.6

Formation & geological history

Formed through the intense weathering or lateritization of nickeliferous serpentinites or other ultramafic rocks. Nickel hydrates migrate into silica-rich solutions and precipitate in veins or nodules.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads, rings) and ornamental carvings due to its vibrant green color.

Geological facts

In antiquity, chrysoprase was known as the 'stone of Venus' and was a favorite of Alexander the Great. Its green color comes from nickel minerals rather than chromium (like emerald).

Field identification & locations

Identify by its distinct apple-green hue and waxy translucency. Common locations include Queensland and Western Australia, Germany, Poland, Russia, and Arizona, USA.

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