Out in the Field Find.

Found this Emerald and diamond pendant mixed in with a bunch of costume jewelry at a thrift shop.

It was marked 14k, but in a difficult to read spot.  Paid $5, sold for $400 

Tip:  If you're serious about buying jewelry, purchase a jewelers loop, and electronic diamond tester.  Just touch it to the stone and it will beep if the diamonds are genuine.