Dazzling pink diamond could procure more often than $21 million at bidding war

Adazzling blue diamond, discussed as among the world's highest form, could try to grab further than $21 million when it would go under the nail in Hong Kong in October, secondary market Sotheby's said that on Wednesday. 

At 11.15 carats, the cushion-shaped ruby is termed "Williamson Pink Star", in memorial to two side pink precious gems.