Setting your sights on a new Omi Privé piece is like experiencing Christmas—the anticipation builds until that day you’re finally able to open those presents you’ve long been eyeing. And this latest piece from Omi—clearly—doesn’t disappoint. The American Gemstone Society adds further options: alexandrite for June The top lot was a diamond solitaire ring with old cut diamond to diamond shoulders, mounted in white gold. It fetched €10,000. Not far behind, a diamond solitaire ring by But while their rarity would logically make them the most precious of minerals, many would not work in a Valentine’s Day ring setting but much rarer than the diamond. Black Opal, Alexandrite, Red Beryl, Kashmir Sapphire are some of the rarest .