The impressive diamond-and-sapphire necklace that Richard Burton gave Elizabeth Taylor on her 40th birthday is one of the most famous necklaces ever created. A new creation from Black, Starr, and Frost, called the Empress, has all the components to become similarly legendary: rare gems, complex settings, expert artisanship, and breathtaking beauty. The Empress draws inspirations from designs of Black, Starr, and Frost’s golden years—the early 1900s, when captains of industries, including the Guggenheim and Van…