Auction introduction: The Summer edition of Christie's Jewels Online features a broad and brilliant array of fine coloured diamonds and gemstones from renowned jewellery maisons such as Cartier, Van Cleef & Arpels, Buccellati, Harry Winston and Michele della Valle. Offering 150 lots, spanning from simple classic designs to bold contemporary pieces, with estimates ranging from HK$1,000 to HK$800,000, the sale is sure to excite both new and seasoned collectors!