Neither acetone nor crazy glue will “ruin” an emerald. If the
emerald has been oiled, the cyanoacryate glue may not enter the
oil-filled fractures at all, or not very deeply. Note “MAY not
enter.” Dissolving the crazy glue with acetone will only “ruin” the
emerald to the extent that it may dissolve out some of the oiling if
there is any. My understanding is that in some cases in preparing a
stone to be re-oiled, seriously drastic measures come into play to
remove the pre-existing oiling, for instance boiling it in a mixture
of nitric and (if I recall correctly) sulphuric acid.Compared to
reagents like those acetone won’t do a thing - to the stone itself.
Worst case scenario is it may conceivably need re-oiling which is no
Just as an after note one thing that can definitely ruin an emerald
is putting it in the ultrasonic. I once transformed one emerald into
three that way. It was not the miracle of the loaves and fishes.