| Having some experience of metal working, he recognised the fragmentary remains as crucibles and clay casting moulds. |
| Thousands of stone hammers, anvils, crucibles, metal objects, and pieces of ancient metallurgical debris were also recovered. |
| Platinum crucibles are used to melt high-quality optical glass and to grow crystals for computer chips and lasers. |
| An unfinished lead buckle suggests some metalworking was taking place at the site, and there are also crucibles. |
| Evidence for smithing includes crucibles, and moulds for plain copper-alloy pins. |
| We produce several capacity crucibles and cupels and only use selected virgin materials for production. |
