| The lead button is cupelled to oxidize the lead leaving behind a dore bead containing the precious metals. |
| Some assay beads disappear, collapse, hide under the surface, or spread out flat while being cupelled, just as the last tiny bit of liquid litharge is driven off. |
| To extract the silver, the Greeks roasted the ore and then cupelled the molten metal. |
| When cooled, the lead is separated from the glass and then cupelled. |
| As far as the historical aspects are concerned, it is necessary to mention the Romanesque Baptistry and the adjacent cupelled boulder with Celtic engravings. |
| The lead button produced is scorified and cupelled leaving a bead of precious metal. |
