Sterling Jewelry
Sterling jewelry is created from a silver alloy. An alloy
is a metal which is composed of more than one material. Sterling options
specifically contain 92.5% silver by weight and 7.5% other materials.
In general, copper with make up the "other" percentage.
Sterling jewelry was conceptualized for a very practical reason. Pure
silver or "fine silver" is very soft. In fact, it is too soft
to create large objects that remain functional. Alloying the material
with something else will overcome this issue.
Copper is a preferred alloy for sterling jewelry for its own reasons.
Obviously, it is important that it increases strength, which it does
magnificently. At the same time, it works to preserve the ductility
and natural beauty of fine silver. Alternatives to copper or possible
combinations with copper as an alloy include zinc and platinum.