We are beginning to see Oved clarity enhanced diamonds in our
repair business. The necessity of retipping on these stones will
rear its ugly head soon enough. I am certain that they can't be
torch retipped, but I'm wondering if anyone of you have had
experience (good or bad) retipping these stones with a laser
I’ve had one experience retipping one prong of a mounting containing
one of these clarity enhanced diamonds, and it was a good experience.
However, the reason it was a good experience is because I took the
same precaution I use when lasering colored stones, and that is to
make a sterling silver shim.
Basically, I take a fairly heavy gauge piece of.925 wire and roll
the end flat, then give it a mirror polish while keeping it as thick
as possible. Holding the mounting, shim and laser wire is extremely
tricky, but it is worth the effort. Basically, you position the shim
between the area to be lasered and the stone. The pulse shape for most
metals is different for sterling than it is for white or yellow gold,
as is the pulse amplitude, so the laser bounces off the shim due to
the high reflectivity of the silver. If the mounting is platinum or
palladium, however, you’d be better of removing the stone since their
laser settings can punch right through a relatively thin silver
Speaking of palladium, I recently completed a simple palladium ring
project using flat, half round and bezel stock that I cut, filed,
formed, etc., and assembled using only the laser welder. I’ve worn it
every day for a few months and it is holding up very well. I took
photos of the entire process, so I’ll try to find the time for an
article (step-by-step) soon.
James S. Duncan, G.G.
James in SoFL