- Base Metal - Any non-ferrous metal excuding precious metals. Common
include aluminum, tin, copper, nickel, and zinc.
- Pewter - A metal alloy, traditionally between 85 and 99 percent tin, with the
consisting of 1-15 percent copper, acting as a hardener, with the
addition of lead for the lower
grades of pewter, which have a bluish tint.
- Sterling Silver - An alloy of silver containing 92.5% pure silver and 7.5%
usually copper. Fine silver (99.9% pure) is generally
too soft for producing functional objects,
and in Sterling the silver is usually
alloyed with copper to give strength while preserving the
ductility of the silver
and a high precious metal content.