It says that the tiara is being sold from the collection of Mamdouha and Elmer Holmes Bobst not Prince Leka.
Quote from Ursula's site "On January 6, 1971 the Australian Women's Weekly published a story about white tie and tiaras. The story stated: Tiaras can also make an evening. About four years ago, Elmer Bobst, chairman of a pharmaceutical company, came home and said to his wife: "I think you are going to like something I got for you." The something was, according to Mrs. Bobst, "a not large but beautiful and decorative" tiara with a ram and flower design in diamonds on platinum. It was once owned by Queen Geraldine of Albania and Mrs Bobst wore it to a White House dinner in honour of her husband. "He really is a wonderful husband," she said earnestly. We think so too!"