London. A huge auction is going to happen on King Street in London on Monday. In these, the world's old jewelry will be kept for sale. This auction is going to be done by Britain's auction house Christie's. The auction will also include the world's oldest diamond, the Brolite of India. Its cost is 63 crores. The money received from the auction is said to be used for social welfare works. This auction to be held in London is being described as the world's biggest jewelry sale. It will consist of 700 ornaments.