There are currently no product reviews.

Assayers Forum The Assayers Community!

Precious Metal Prices

[Most Recent Quotes from]

[Most Recent Quotes from]


The lead button for cupellation is typically generated in the crucible fusion from the fire assay process, but can also be produced by a scorification assay, or a bullion assay where the precious metal is wrapped in lead foil.

Typical cupellation furnace temperatures in gold and silver assays are 1650-1700F, but can vary with technique, air flow volume, and cupel material.