CUPELLATION
Etymology
Noun
cupellation (countable and uncountable, plural cupellations)
The assaying of precious metal in a cupel.
Source: Wiktionary
Cu`pel*la"tion (k`pl-l"shn), n. Etym: [See Cupel.]
Definition: The act or process of refining gold or silver, etc., in a
cupel.
Note: The process consist in exposing the cupel containing the metal
to be assayed or refined to a hot blast, by which the lead, copper,
tin, etc., are oxidized, dissolved, and carried down into the porous
cupel, leaving the unoxidizable precious metal. If lead is not
already present in the alloy it must be added before cupellation.
Source: Webster’s Unabridged Dictionary 1913 Edition