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Acid cleaning diamonds


#1

Thank you, I get a lot of advertisements from diamond cutters,
wholesale stuff, whats the “acid cleaning” they’re offering?

and if this doesn’t have anything to do with scorched diamond, does
anybody have any tips on scorched diamond melee?

Thanks -Chris


#2
tips on scorched diamond melee? 

Grind it up, sift it, and it makes a fine abrasive. Periodically we
haveguys come around who’ll pay $20/carat for it… Chipped, broken,
burned…


#3
Thank you, I get a lot of advertisements from diamond cutters,
wholesale stuff, whats the "acid cleaning" they're offering? 

It’s just that. cleaning. Strong acids, which don’t affect diamond,
will nicely remove various things from the usual grease/oil/finger
jam junk, to residues of metal, such as might grind into the girdles
of stones that have been set.

and if this doesn't have anything to do with scorched diamond,
does anybody have any tips on scorched diamond melee? 

Burned/scortched diamonds are not dirty. The polished surface has
been etched/damaged by oxidation of the carbon. You can’t just clean
it. You have to repolish the stones. Diamond cutters can do this of
course, but it’s not “acid cleaning”. It’s repolishing or recutting.
Whether it’s worth doing depends on the size and quality of the
melee. Often, it’s not worth doing. I save a few such damaged
stones, along with chipped ones, for the occasional repair where one
is replacing really terrible quality junk, and in some such cases,
damaged stones match better than decent quality ones. And some are
useful for making stipple tips for the hammer handpiece…

Peter Rowe