How to spot a diamond
When is a diamond really a diamond?
When it\u2019s been formed miles underground a billion years ago, or when has it been created in a laboratory, under temperatures close to the heat of the sun? The answer is \u2013 both are true. They look and behave exactly the same, but they are very different in price.
The lab-grown diamonds are marketed as kinder to the environment, and they are far cheaper - and that\u2019s led to concern about whether the two kinds have been mixed together, with man-made stones passed off as natural. So, what is the industry doing to give consumers confidence?
(Picture: Close up of man putting engagement ring on girlfriend. Credit: Getty Images)
Presenter: Lesley Curwen\nProducer: Barbara George