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Leviev's diamonds are mind-boggling and beautiful—and not for the faint of heart (or light of wallet). The store specializes in colored diamonds and rare white diamonds and owned the world's first certified fancy vivid-blue flawless diamond. Beyoncé won't have anything on your 58-carat D-flawless emerald-cut diamond ring, but she can always "settle" for the 3.22-carat purplish-pink diamond ring. Prices upon request.

Lev Leviev opened his new storefront last November. He carries rocks for the well-heeled and famous (Drew Barrymore, Teri Hatcher, and Kristin Davis), as well as reasonably sized stones (from $20,000).