RAPAPORT... Sapphires stole the show at the latest Bonhams jewelry sale in London, with the top lot more than doubling its high estimate.A late-19th-century sapphire, diamond and natural-pearl pendant fetched GBP 206,500 ($273,285) at the December 2 London Jewels sale, Bonhams said last week. That piece was followed by a ring with a 3.52-carat Kashmir sapphire and diamonds, which realized GBP 187,...
