How to Care For Silver Jewelry
Silver jewelry has a lovely patina, but the sad fact is that the
patina darkens with age, turning from the original brilliant
silver, to a light gold, and if left long enough it will become
bronzed and then a black/blue.
This is due to the chemical reaction of the silver, with
sulfides present in the environment. This is usually due to
airborne pollutants, but can also be transferred to the jewelry
on your hands.
One of the first rules of keeping your silver jewelry shining,
is to store it properly in acid-free paper, or cloth especially
for that purpose. Put them in a drawer or other safe place, that
is away from exposure to wood or other types of smoke.
It is best to keep jewelry polished, instead of trying to play
"catch up" when it has become heavily tarnished. But there are a
number of ways to deal with the darkening color.
There are many home solutions, such as using white toothpaste
and a soft brush. However, some jewelers point out that silver
is not tooth enamel, and can't withstand the abrasive content.
Although on things like chains, it's unlikely you would see any
resulting scratches.
Commercial solutions do work, but depending on the nature of
your jewelry (e.g. whether it contains gemstones or pearls), you
may not be able to submerge it completely, and the cleaning will
be uneven.
One basis of both commercial and home cleaning solutions, is the
creation of an electrochemical cell, where there is a metal
ingredient that is anodic to silver. This means that it will
help turn the silver in the sulphide tarnish, back to silver.
A favorite home treatment is to line a pot with aluminum foil,
one of the metals anodic to silver, put your jewelry in, and
cover it with water, then add several tablespoons of baking
soda. Boil gently until you see that the discoloration is gone.
Your jewelry may be completely clean, or may have a white powder
on its surface from the oxidization. This can be removed easily
with a baking soda paste. Remember to exercise caution in
cleaning silver jewelry. If it is not purely silver, like a
chain or bracelet, the treatment you use can damage soft stone
or pearls.