| within its structure | 10 | other |
| amethyst → contain → iron | 5 |
| amethyst → have → small amounts of iron | 3 |
| amethyst → be → iron | 3 |
| negative | neutral | positive |
| 0.033 | 0.872 | 0.095 |
| Raw frequency | 11 |
| Normalized frequency | 0.296 |
| Modifier score | 0.500 |
| Perplexity | 462.089 |