If 'The Golconda Blue' went to auction it would have been the largest fancy vivid blue diamond to have been presented at a ...

(IDEX Online) - The Golconda Blue, a 23.24-carat pear-shaped gem with a high estimate of $50m, has been pulled from Christie's sale in Geneva next month. The auction house said the (unnamed) owners ...

Since then, the neon blue gem has become ubiquitous and prices have rocketed. Through her gem portfolios, Hangartner works with clients to use gemstones for wealth preservation. With the diamond ...