Info: The most precious variant of chalcedony is the apple-green translucent chrysoprase. The crystal of chrysoprase have little enclousures, which are rich of nickel.
How to recognize: When heated or longly exposed to sunlight, the bright green colour of praseme becomes pale.
Found: The most famous deposits of chryzoprase were found in Australia, Russia, USA and in Brazil.
| Crystal structure |
| Trigonal |
| Hardness |
| 7 |
| Colour |
| Green |
| Shine |
| Wax |
