mineral

Chrysoprase

Silicon Dioxide (Nickel-bearing Chalcedony) - SiO2

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Apple-green to deep green; Luster: Waxy to vitreous; Crystal Structure: Cryptocrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.58–2.64

Hardness: 6-7 on Mohs scale
Color: Apple-green to deep green
Luster: Waxy to vitreous

Identified April 4, 2026More mineral →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Apple-green to deep green; Luster: Waxy to vitreous; Crystal Structure: Cryptocrystalline (Trigonal); Cleavage: None; Specific Gravity: 2.58–2.64

Formation & geological history

Formed through the heavy weathering or lateritization of nickeliferous serpentinites or other ultramafic rocks in tropical climates. The green color is derived from nickel compounds.

Uses & applications

Predominantly used as a gemstone for jewelry (cabochons and beads) and ornamental carvings. It is also a popular specimen for crystal healing collectors.

Geological facts

It is often mistaken for imperial jade due to its translucent green appearance. Unlike most green gemstones which get their color from chromium or vanadium, chrysoprase owes its color to nickel.

Field identification & locations

Identify in the field by its distinctive waxy luster and apple-green color within weathered serpentine deposits. Major deposits are found in Australia (Queensland), Poland, Germany, and Brazil.