Russian mining giant Alrosa trumpeted its big-diamond cutting prowess with the unveiling of The Dynasty, a 51.38-carat round brilliant-cut sparkler. The 57-facet, D-color, VVS1 gem is the largest of five polished diamonds all culled from The Romanovs, a 179-carat rough stone recovered from the Nyurbinskaya kimberlite pipe in the Russian Republic of Sakha (Yakutia) in […]