Founded by Nadine McCarthy Kahane in 2013, Stone and Strand has always set out to make fine jewelry feel ... back elegance. Each diamond is graded at or above H color and VS clarity, with stones ...

The 10.03-carat Mediterranean Blue gem will be the crown jewel at Sotheby’s High Jewelry ... color grading for a blue diamond from the Gemological Institute of America. Better still: The stone ...