"Harold & Susan Vordos" wrote in message ...
And more. Depends on the color desired, and the sacrificial element used to
keep the properties of gold useable. Each refinery has its own 'secret'
constituent. Each time gold is melted, it tends to lose its ability to be
worked, thus it can not be melted endlessly once alloyed. Smart benchmen
melt only the amount needed, and use the small sprue from one casting in the
following casting,having pickled it well. That way they work with fresh
metals constantly.

Green gold is comprised of gold, silver and copper, percentages varied
dependent on the karat fineness. Red gold is copper and gold. White gold
has NO silver, only gold, nickel or palladium. Gold and silver combined
yield green. Go figure!

Harold

Hi, Harold:

Some white gold alloys DO have silver in them -- I use an 18kt
palladium white alloy from PM West that is 75% gold, 15% palladium,
and 10% silver. It's a nice, very workable alloy with good white
color.

Regards,

Bob