Thanks. Good idea.
In years past I found a dozen or so rings with synthetic stones, more keepsakes than jewelry. I pried out the fake stones and put them in a cloth bag. I waited until six or eight guys were trading stories at my local treasure hunter/metal detector shop hangout and without a word dumped the bag full of rubies, emeralds, and diamonds onto the counter. That was fun, except they wouldn't talk to me for about a month.