(ii)
In United States’ usage, doré bullion is synonymous with base bullion:
crude lead with recoverable silver, with or without gold.
Doré Bullion
(i) An
impure alloy of gold and silver produced at a
mine that will be refined to high purity metal.
The median for gold doré is 65 percent gold and 35 percent silver.
A doré bar comes out
of the smelter at
the Lupin mine on the Arctic Circle
(Credit: Timothy Green)