Largest topaz of its kind to go on display
September 29, 2016
London’s Natural History Museum will play host to one of the world’s most flawless, large gemstones. The Ostro Stone will be on permanent display in the museum’s minerals gallery. Max Ostro discovered the 9381-carat stone three decades ago in Brazil, and it has been locked in the family safe ever since. The stone—which is 15… Continue reading...