The central diamond is likely of exceptional quality, with VVS1 clarity and colorless grading in the D-F range. I would estimate the ring to be worth upwards of £800,000 ($1 million), depending ...

The central diamond is likely of exceptional quality, with VVS1 clarity and colorless grading in the D-F range. I would estimate the ring to be worth upwards of £800,000 ($1 million), depending ...

Among the auction houses, Christie’s is one of the biggest players, generally holding several of the top spots for jewels with the highest prices fetched at auction. But this year, the company smashed ...