At the risk of saying something you may already know, I would like to
advise you that boric acid will etch the surface of saphhires when
soldering. It can also etch other corundums, but not as severely.
I’ve also been tipping set diamonds (for over 25 years) and have never
seen any problems, although I had been warned about various things
(boric acid, solder, etc…) sticking to the diamonds.
One of my fellow jewelers once blew up a 1 ct. diamond while trying to
tip it with platinum (dummy!) It exploded like a fire cracker (loud!).
It had a large black carbon inclusion in it that expanded.
I have soldered prongs w/diamonds in place and quenched them in sparex while
very hot never ahad a failure done this for 20 years. Has anyone ever
experienced a diamod shattering from such treatment? I have also soldered
rubies and sapphires in place succesfully but am not sure that you dont get
some color change in some cseses so I rrmove colored stones these days.
Handmade 18K, 22K, and platinum gemstone fine jewelry.
Diamond setting, rubber/metal molds, casting, lapidary
Die and mold engraving, plastic patterns for casting.
Cad jewelry design, cad/cam milling scroll filigree…
P O Box 2057 Fairfield IA 52556 515-469-6250