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| pebble; silica | |||
| chert; hornstone; flint; silex | |||
| boulder flint | |||
| crushed or broken stone | |||
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| pebblestone; gravelstone; min. silex | |||
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silex : 15 phrases in 9 subjects |
| Coal | 2 |
| Construction | 2 |
| Earth sciences | 1 |
| Environment | 1 |
| General | 2 |
| Geology | 1 |
| Industry | 3 |
| Medical | 2 |
| Metallurgy | 1 |