Hello Lisa, The following is a little away from your original query,
but you may find it interesting. I have completed a number of pieces
where I have transparent-enamelled over pave-set diamonds in platinum.
My first attempts were not too awful, but after doing a couple of
courses with Carolyn Delzoppo here in Sydney, Australia, I realised
that I had been putting the pre-fired enamel on too heavily, and not
using clear flux to advantage. (I was getting too many bubbles in the
fired enamel which clouded the appearance of the diamonds.) Since
Carolyn’s tuition, the results have been quite beautiful. The trick is
to put the enamel on in thin layers rather than impatiently trying to
put too much on at once. It’s painstaking, but worth the effort.
The diamonds go through the kiln heat quite happily. While enamel
slips off smooth or polished platinum quite readily, the beaded metal
of the pave-setting holds the enamel well.
Rex in Olympic-mode Sydney - and loving it!