there is a pin, sterling 18K gold doublee, 24K gold, aquamarine
garnet 1) How do you give this different colors to gold?
18k gold sheet is fused onto sterling to make sheet. Then I engrave
through the gold exposing the silver, roll it out, roller print it
with paper, use dilute liver of sulfur and ammonia to bring up colors
on the surface of the gold.
2) How do you quality mark your mixed metal?
By concentration, the most is first, then the next and so on towards
the metal that is least. In the above example it is stamped 925, 18k,
24k, as there is more silver than other metals, more 18k than 24k. I
think I am correct in this understanding. Charles
Box 1624, Ste M, Calgary, Alberta, T2P 2L7, Canada