Sri Lankan gem trader discovers world's largest star sapphire cluster

According to the BBC, the world's biggest star sapphire cluster was discovered inadvertently in a garden on Tuesday. The stone was discovered by employees digging a well in his home in the gem-rich Ratnapura region, according to a diamond merchant. The ‘pale blue' stone weighs about 510 kilos and is believed to be worth up to $100 million on the worldwide market, according to specialists. The "Serendipity Sapphire" is the title given to it.