The simple answer to this question is any method that works for you
and makes your specific application and your life easier is perfectly
acceptable. If your bezels have closed backs, or enough of a rim or
ledge that the glue won’t be visible once the stone is set, you can
glue the stones and let it your adhesive set up completely, before
securing the bezels.
Some setters occasionally have to resort to this method in order to
secure a stone in the correct position during the setting process, and
then dissolve the glue after completion. But there is a disadvantage
in this instance of adding an additional step to the finishing
sequence and requiring a solvent to remove the adhesive.
Usually we try to use microcrystalline wax (also called setters wax
or sticky wax) for this purpose because it will be very easy to remove
during the final polishing or cleaning of the completed piece. There
should be a few threads on microcrystalline wax in the archives.
Michael David Sturlin,