(AGI) London, Sept 9 - Mining company Petra Diamonds has founda 232.08 carat white diamond in the Cullinan mine in SouthAfrica. According to analysts, it could be worth between 10 and16 million dollars. In response the company's shares jumped 6.5percent on the FTSE 250 Midcap index in London on Tuesday. Thewhite diamond just discovered is the biggest since the 507carat Cullinan Heritage found in the same mine in 2009, whichsold for a record price of 35.3 million dollars. (AGI) . .