mineral
Chrysoprase
Silicon dioxide (SiO2) with nickel impurities
AI-generated identification · may be incorrectHardness: 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
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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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Sandstone (with potential mineral staining/concretions)
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Epidote
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Granite
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