Paul Ciszek wrote:
http://www.tclayton.demon.co.uk/metal.html

This page lists the various metals and alloys that have been used
for coinage, with examples. Also includes a few non-metals.
Can't vouch for the accuracy, but I found it a fun read.

Without doing the research myself, I can't vouch for the accuracy
either. However, having been a frequent visitor to Tony Clayon's site,
I would have to vouch for Tony and his work. Tony is a frequent
contributor to RCC