A Hong Kong jewellery company in china sold off a 507-carat unpolished diamond, registering its name for the world record, with $35.3 million yield.

Miner Petra Diamonds company disposed off the Cullinan Heritage diamond in a tender to South Africa's Chow Tai Fook Jewellery Company in Hong Kong, with the highest price tag ever acclaimed for any rough diamond.

The estimates of the brilliant stone have underlined the market strength in the world of magnificent diamonds. According to the researchers, the diamond is the rarest quality stone ever discovered, to fetch a big sum.

The diamond was discovered from the Petra's Cullinan mine originated in South Africa, the major mine source for diamonds.

It is to be assimilated that the Petra diamond is the 19th largest gem diamond ever discovered in the world history.

However the Chow Tai Fook Jewellery group will find a buyer in China, for one of the brilliant stones in the world's biggest and fastest growing diamond markets.

Once the stone comes out of the finishing spa, it would cost much more than the rough diamond.

According to a leading authority on gemstones, rough diamonds could undergo a series of tests for to examine its clarity.