Couple of things - is the sterling Argentium or plain ole sterling?
Once in a while, you will get a bad batch of silver that breaks.
I’ve hadbad solder, bad 10g. round wire that kept splitting, no
matter how careful I was, and some old silver sheet.
Sounds like the trivet did not provide support, and when you were
heating the sheet and applying gentle pressure, it was too much for
the sheet metal. I found if I don’t support my sheet metal, the
corners start drooping.
You’ll need to find a charcoal block or a screen to do your bezels
in the future to avoid breakages. Also, after I roller-print my
sheet metal and flatten them, I have to anneal the sheet, before I
put my bezel on, otherwise, the sheet warps from the uneven
stresses. You may also havebad silver sheet. Buy a fresh piece of
silver sheet metal and get a screen and try again on your bezel.
Another tip, if you can get 26g. fine silver bezel strip, use that.
Avoid 30g. bezel strip and use 28g. if you have to, but 26g. bezel
strip isbest, and even thicker if possible.
Joy (who has done one too many bezels, thousands of them by now)