Anyone attending the Christie 's Magnificent Jewels auction next month might want to bring a pair of sunglasses with them . The array of glittering precious stones on display at the event in Geneva on May 13 is blinding . It includes a pink diamond worth £8million , a sapphire worth £2.7million and a pair of diamond earrings with £670,000 . A Christie 's employee wears the Maria Christina Royal Devant-de-Corsage brooch , which is expected to fetch £1 to £1.33million . Overall , the auction is expected to raise in excess of £53million . 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 was presented as a wedding gift from King Alfonso XII of Spain to his wife , the Archduchess Maria Christina of Austria in November 1879 . Among the highlights of the important colourless and coloured diamonds is a pear-­‐shaped D-­color Flawless diamond of 55.52 carats ( estimate : £5,650,000 – 7,000,000 ) , a rectangular-­cut Fancy Vivid Pink diamond of 5.18 carats ( estimate : £6,300,000 – 8,300,000 ) and an Ashoka-­cut D-color Flawless diamond ring of 21.75 carats ( estimate : £1,860,000 – 2,330,000 ) . A sapphire and diamond ring with the cushion-shaped sapphire of 35.09 carats from Kashmir and of Royal Blue colour . The ring is expected to sell for some £2 - 2.7million ) Also for sale is a pair of antique emerald Indian bangles , which are believed to have descended from one of the more prominent Indian Royal families . Set with large emeralds , they would have been worn spaced with other gem-­set bracelets in the style of the Art Deco period in the 1920s and 1930s . The bangles come with fitted red leather cases embossed with a gold B on each of them and are especially rare because they are one of the few old Indian jewels that have not been taken apart for their gem content . The auction also features a pair of ruby and diamond ear pendants and matching ring , by Van Cleef & Arpels that was once owned by Jacqueline Kennedy Onassis - they were given to her as a wedding gift by Aristotle Onassis in 1968 . An unmounted diamond , colour D , of flawless clarity and 55.52 carats , which is expected to sell for £5.7 - 6.7million . The Maria Christina Royal Devant-de-­Corsage brooch was presented as a wedding gift from King Alfonso XII of Spain to his wife , the Archduchess Maria Christina of Austria in November 1879 .
Christie 's is holding a Magnificent Jewels auction next month in Geneva . Overall , it is expected to raise in excess of £8million . Includes pink diamond worth £53million and sapphire worth £2.7million .