With due respect to your comment about flawless rho, I have polished
hundreds of rhos using the ZAM/ cotton buff method described and
never encountered a serious undercut. I assure you I do not always
work with flawless rho though I do try to use 'the good stuff'.
Ditto on malachite. I suggest a person not sure of the best method
should use each and judge for themselves. Sorry for any disagreement
but didn't want anyone to get the impression that ZAM might ruin
their prize rho!
Also, Holy Cow is now always available and can be quite
expensive....though a little bit goes a long way. I use it for
particularly difficult to polish stones and, Docktor is right, it
does a great job. ZAM, on the other hand, is readily available as are
Cheers from Don at The Charles Belle Studio in SOFL where simple
elegance IS fine jewelry! @coralnut2