Robuta

https://www.sothebys.com/en/auctions/ecatalogue/2018/magnificent-jewels-and-noble-jewels-ge1805/lot.570.html (#570) RARE PAIR OF FANCY VIVID BLUE DIAMOND PENDENT EARRINGS fancy vivid blue diamond rare pair 570 pendent earrings https://www.sothebys.com/en/auctions/ecatalogue/2018/magnificent-jewels-and-jadeite-hk0817/lot.1892.html (#1892) A RARE AND IMPORTANT FANCY VIVID BLUE DIAMOND AND DIAMOND RING fancy vivid blue diamond 1892 rare important ring https://www.sothebys.com/en/auctions/ecatalogue/2014/mellon-jewelry-n09246/lot.37.html (#37) A Magnificent and Rare Fancy Vivid Blue Diamond Pendant fancy vivid blue diamond 37 magnificent rare pendant https://www.sothebys.com/zh/auctions/ecatalogue/2011/jewels-and-jadeite-hk0364/lot.2851.html (#2851) RARE AND IMPORTANT FANCY VIVID BLUE DIAMOND AND PINK DIAMOND RING fancy vivid blue diamond 2851 rare important pink https://www.christies.com/lot/lot-a-fancy-vivid-blue-diamond-and-coloured-4173796/? A FANCY VIVID BLUE DIAMOND AND COLOURED DIAMOND RING | Christie's A FANCY VIVID BLUE DIAMOND AND COLOURED DIAMOND RING fancy vivid blue diamond coloured ring christie https://www.sothebys.com/en/auctions/ecatalogue/2016/magnificent-jewels-and-jadeite-hk0637/lot.1843.html (#1843) Superb and Rare Fancy Vivid Blue Diamond and Diamond Ring fancy vivid blue diamond 1843 superb rare ring