| Name | Amethyst |
| Class | Semi-precious |
| Category | Quartz |
| Crystal system | Hexagonal |
| Chemical composition | Silicon dioxide (SiO₂) with traces of iron |
| Hardness (Mohs scale) | 7 |
| Transparency | Transparent to translucent |
| Geographical origin | Brazil, Uruguay, Zambia, Russia, India, Madagascar |






















































































































































































































