I picked up a lot of estate stones that look like beautiful star
sapphires. How can I determine if they are natural or man-made?
Since you don't tell us whether or not you have any gemological
equipment it is hard to tell you what to do to identify the stones.
It would probably be best if you found a knowledgeable gemologist in
your area and pay to have them appraised. On your own , what I can
tell you is that if the stones appear to be perfectly cut (no rounded
bellies, even sizes, 10mmx8mm, 8mmx6mm) and have perfect six rayed
stars, the odds are that the stones are synthetic. However it is not
a guarantee that they are synthetic with these conditions, it is just
that the odds go up. Better to see a gemologist.
Daniel R. Spirer, GG
Spirer Somes Jewelers
1794 Massachusetts Ave
Cambridge, MA 02140