cupel

A small, porous bowl, typically made from bone ash, used in the assaying process to separate precious metals like gold or silver from base metals such as lead.

• 🇩🇪Kleine poröse Schale, meist aus Knochenasche, die bei der Kupellation verwendet wird, um Edelmetalle wie Gold oder Silber von unedlen Metallen wie Blei zu trennen.

1. Assaying vessel C2 formal scientific

   A small, porous cup made of bone ash or similar material, used in the process of cupellation to separate precious metals like gold and silver from base metals such as lead.

   • The assayer placed the lead button containing the gold into the heated cupel.
   • Bone ash cupels are essential for accurate fire assay analysis.
   • The impurities were absorbed by the porous cupel, leaving a pure silver bead.

   🇩🇪Kupelle für die Probenanalyse

   Synonyme: test

• cupels plural form
• cupels' possessive plural form
• cupel's possessive singular form