The Prince of Johannesburg is the most important Black Diamond to be made public since the Amsterdam was first shown in February 1973. With the unveiling of the Prince of Johannesburg, the House of Louis XV now holds the most important collection of Black Diamonds in the world. The Prince of Johannesburg shall be on display in the Louis XV Salon for all of 2007. In 2008, Louis XV will offer Arizona''s Largest Diamond for sale.