gemstone
Chrysoprase
SiO2
AI-generated identification · may be incorrectHardness: 6.5-7; Color: Apple green to deep green; Luster: Vitreous to waxy; Crystal structure: Cryptocrystalline; Cleavage: None
- Hardness
- 6
- Color
- Apple green to deep green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7; Color: Apple green to deep green; Luster: Vitreous to waxy; Crystal structure: Cryptocrystalline; Cleavage: None
Formation & geological history
Formed in the weathered zones of nickeliferous serpentinites or other ultramafic rocks. Often found in nodules or veinlets.
Uses & applications
Used primarily as a gemstone in jewelry, often cut into cabochons or beads. Also used for carvings.
Geological facts
Its green color is due to trace amounts of nickel, unlike emerald which is colored by chromium. It is a variety of chalcedony.
Field identification & locations
Identify by its distinctive apple-green color, hardness, and waxy luster. Common locations include Australia (Queensland), Germany, Poland, Russia, and the USA.
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