If 'The Golconda Blue' went to auction it would have been the largest fancy vivid blue diamond to have been presented at a public sale. Its estimate was $35 - $50 million ...

Sotheby's Geneva is showcasing the "Mediterranean Blue Diamond," a 10-carat gem expected to fetch $20 million at auction.

this extraordinary diamond has been reimagined time and again by the greatest names in jewelry history. With its royal provenance, exceptional color, and remarkable size, the Golconda Blue stands ...