NNPA NEWSWIRE β Unearthed in South Africa in 1905 and titled after Thomas Cullinan, the Cullinan Diamond was the largest gem-quality, rough diamond ever discovered. Today, it rolls in the form of bespoke British craftsmanship. This $426,700 ($330,000 MSRP) piece of jewelry is highlighted by a $20,000 Twilight Purple paint scheme and a contrasting $8,000 Silver Satin Bonnet Finish.