Few things are as classic as the Art Deco onyx cocktail ring - they are the vodka martini of jewelry collections. Here, a diamond is set into a white gold frame, which is surrounded by the tiniest spattering of milgrain. The diamond is perched atop a juicy chunk of black onyx, and surrounded in 10k gold. Maybe your grandmother had one. Or maybe it reminds you of a time when you used to get all dolled up - remember those? Dark and delicious nostalgia....