Complex sentence: Historically, many coinage metals (or alloys) are from the three nonradioactive members of Group 11 of the Periodic table (copper, silver and gold); however there are many, even for coins made from intrinsically precious metals.
Split into simpler sentences: Historically, many coinage metals (or alloys) are from the three nonradioactive members of group 11 of the periodic table: copper, silver and gold. However there are many more, even for coins made from intrinsically precious metals.