A 39.19 carat extremely fine rough blue diamond has been bought by London-based fine jewellers – Moussaieff Jewellers. This diamond is a record to be cited in the market in the last fifteen years. It has the potential to be of exceptional intense colour and excellent clarity and it joins a family of some of the rarest natural coloured diamonds ever assembled. %% “Blue diamonds are rare and getting rarer and rarer” said Alisa Moussaieff President of Moussaieff Jewellers. This recent purchase has placed Moussaieff Jewellers as the leaders in the global fancy coloured diamond market. Within the last twelve months Moussaieff purchased a unique 6.04ct emerald cut Vivid Blue diamond also the world's largest certified red diamond at 5.11ct 'The Moussaieff Red.' %% The increasing scarcity of polished coloured diamonds in the open market, is prompting Alisa Moussaieff to acquire exceptional coloured rough diamonds at source and other rough polished in-house. The ongoing financial crisis has no holding on the purchase of fancy coloured diamonds as the blue one or such others, as opined by Alisa Moussaieff. She believes such diamonds will continue to appreciate in value, as the market for diamonds of this rarity is liquid.