Investment Not Art' is rightly defined with this Platinum and Diamond Skull. Damien Hirst, the U.K.'s wealthiest artist, is part of the investment group that is buying his diamond skull for $100 million and plans to resell it later. The skull, cast from a 35-year-old 18th century European man but retaining the original teeth, is coated with 8,601 diamonds, including a large pink diamond worth more than four million pounds in the centre of its forehead.