Coinage metals
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The coinage metals comprise those metallic chemical elements and alloys which have been used to mint coins. Historically, most coinage metals are from the three nonradioactive members of group 11 of t
An aluminium token coin from the 1887 American Exhibition in London. At the time, aluminium was complex to produce and more valuable than silver
A 1950 iron Swedish krona coin, with face value of 5 öre
An 1812 gold 4000 réis coin from colonial Brazil
Stamp money Russia 1915 15k
Billon (alloy)
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Billon is an alloy of a precious metal with a majority base metal content. It is used chiefly for making coins, medals, and token coins.
Billon dirham of Abbad II al-Mu'tadid, dated 439 AH (1047–1048 AD)
Billon bawbee coin of James V of Scotland (coined between 1538 and 1543)
Billon Two Gani of Delhi Sultan Ala al-din Khilji.
Billon nickel from 1942–45, with "D" mintmark and unusual color.