Alrosa Jubilee 100 Diamond
In honor of its 100th auction of large diamonds, mining firm Alrosa is selling one of its most impressive finds. This rare gem-quality rough diamond weighs in at 242.31 carats, large enough for cutting a single stone larger than 100 carats. It measures 0.85" x 1.23" x 1.65", and will be on display at the company's Dubai sales office before being auctioned off on March 22.