In regards to what Brad said, yes, you may fuse the joint or use 1700
(or less) solder in sizing a platinum ring but only and only if the
shank is thin and the work can be done quickly, if the shank is thick
do not use this method the diamonds will burn, stick to the 18k white
hard solder (what we use) or the 20k (never tried it).
Laurie in Connecticut, where we are suppose to get more snow…