If you heat it in an oxidizing atmosphere the Copper in the Sterling will
oxidize and turn black. If you then dunk the heated section into a pickle
soln. it will brighten back up. If you heat Fine Silver it doesn't blacken
at the lower temperature required for Sterling's Copper to oxidize.

--
Don Thompson

"The bravest are surely those who have the clearest vision of what is before
them, glory and danger alike, and notwithstanding go out to meet it."-
Thucydides

"Men are never really willing to die except for the sake of Freedom:
Therefore they do not believe in dying completely."-
Albert Camus


"Jenny" wrote in message
...
Does anyone know how to tell the difference between sterling silver &
fine silver?
I have a bunch of sheet & wire that's pretty old, with fine & sterling
silver mixed.
Is there a heating/color change/soldering type trick to tell which is
which?
Much Thanks!