Gems Material values His dark materials Charlie McCann can’t resist the pull of Fabio Salini’s jewellery
Gems Colour revolutions Long eclipsed by diamonds, coloured stones are on the rise. But, says Jonathan Rosenthal, buyers need to beware the risks
Gems The great big diamond boom More huge diamonds are being found than ever before. The prices are enormous, as Jonathan Rosenthal discovered, and so are the risks
