the array of glittering precious stones on display at the event in geneva on may 13 is blinding that it includes a pink diamond worth £ 8million , a sapphire worth £ 2.7 million and a pair of diamond earrings with £ 670,000 .
overall , the auction will showcase 351 historically significant and antique jewels spanning from the 18th to the 20th centuries .
the most important piece is the maria christina royal devant-de-corsage brooch , which are believed to have descended from one of the more prominent indian jewels that