I have probably set fifty or so of these things. A good number
(1/3 - 1/2?) in platinum. Some of these designer settings have
even required the stones to be soldered in. So far no cracks. I
have managed to chip one and a client has managed to crush one.
C3 replaced the one that the client crushed. As I said before, I
haven’t seen flux etching. I surely haven’t seen these black
specks. Perhaps someone tried to retip platinum with the stone
in? I use batterns flux and sometimes boric acid to check
If I can think of it, I may call C3 tomorrow.
Bruce D. Holmgrain
Maryland’s first JA certified Master Bench Jeweler