'Flawless' 100.2 carats diamond on show in Dubai An internally "flawless" 100.2-carat diamond was on show Monday in Dubai ahead of being sold at auction next month by Sotheby's which hopes it can fetch up to $25 million. The stone, which was discovered a decade ago in the De Beers mines of South Africa, will go under the hammer at a "Magnificent Jewels" sale in New York in April, the auction house said. IMAGES AND SOUNDBITES