You find a box of old brooches, clip-on earrings, and chunky necklaces in a closet or from a relative’s estate. You’re not sure if it’s all “junk jewelry” or if one of those pieces could help you ...

There's an old saw that the reason most of us only know a good opera when we see one is because someone told us so. The same is true with jewelry. Lacking a fancy label or tiny marking, otherwise ...