Opening the book…
| Chrysoprase | |
|---|---|
| Chemical composition | Silicon dioxide SiO2 |
| Crystal system | Trigonal |
| Habit | Aggregate |
| Hardness | 6.5 - 7 |
| Refractive index | ± 1.54 |
| Specific gravity | 2.55 - 2.70 |
| Lustre | Vitreous |
Figure \(\PageIndex{1}\): Chrysoprase Cabochon
Photo courtesy of Rick Martin
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