Chrysoprase
Chrysoprase is a variety of chalcedony that contains nickel, which gives it a natural apple-green color. Characterized by its bright, refreshing hue, it has been used in jewelry since ancient times.
Refreshing green Chrysoprase
Basic Information
| Chemical Formula | SiO₂ + Ni |
|---|---|
| Classification | Hexagonal (cryptocrystalline) |
| Hardness | 7 (Mohs scale) |
| Specific Gravity | 2.60 |
| Crystal Structure | Aggregate of microcrystalline quartz |
Characteristics
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Nickel Coloration: Its unique green color is derived from nickel content.
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Color Uniformity: Generally, the more uniform the color and the higher the transparency, the more valuable the stone.
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Color Variations: Light Green Apple Green Pale Blue-Green
Varieties & Aliases
- Variety Matrix Chrysoprase: A type containing white or brown spots.
- Variety Dendritic Chrysoprase: Featuring tree-like patterns.
- Alias Mtorolite: A chromium-based variety from Zimbabwe.
Note: Since dyed imitations exist, be sure to confirm whether the color is natural.