Jocelyn, Interesting question and drives me to ask "Why?" Not
because it's not an intriguing idea, but to help me think through the
pros/cons of the approach.
I use intense purples and peacock greens a fair amount in my work in
silver. I love the iridescence that comes from a well-crafted
patina on silver, and as far as I know you can't achieve that effect
on gold. (I may be wrong as I don't work in it all that much --
feel free to enlighten me on gold patinas!)
So far, I've achieved effects that are quite permanent (I use
lacquer or wax to "fix" the surface), with good control of where to
patina by using masks.
I assume with a truly purple-colored alloy, the coloration might be
more consistent, but would it be as rich? What about control and
heat-tolerance? Brittleness -- like the problems with purple gold
that make it virtually unusable -- would be a serious problem.
So what would the tradeoffs be in these two approaches? You've got
my mind working on it!
Hand-crafted artisan jewelry