The W bars should sound different from gold when tapped by a hammer because it is stiffer. It rings. Just in case any of us were tempted to go out and buy a bar.
W density is 0.4% less dense than gold.
I have a large statue of a bird of prey cast in gold, covered with black paint to disguise it. It’s the stuff dreams are made of.
and your address is
The ring would be suppressed by the gold coating...........
A Maltese Falcon?