Oct. 8 - A vivid blue diamond sets a new record per-carat price in an auction in Hong Kong.

The ring contains the largest and rarest vivid blue diamond on offer since Sotheby’s Hong Kong auction in 2004, when a similar piece sold for US$4.2 million. The last record set for a gemstone of the ring’s carat size was 20 years ago, according to the auction house.

Benet Allen reports

Platinum ring features a 0.70 carat man made blue diamond. Created by Michael Drechsler Jewelry - http://3Djeweler.com