The financial gain to be had from swapping one diamond for another would be negligible for any good jeweller. In other words, it’s just not worth it – plus you’re assuming that the jeweller carries enough diamond stock to cover all possible size and shape variations.

Since very few diamonds are the same measurements you should be able to spot a change. But it wouldn’t be worth the expense or effort to try to find one with the exact same dimensions to fit back into the setting.

It takes a lot of time and effort to work out a stone from a setting and reset another one. Removing it would be fairly quick but replacing it with the same size/shape and then repairing the claws would take time.

As a small business, we don’t carry any stock of large loose diamonds, we only ever order them in on specific request.

Above all else though, we are a small, growing business here for the long haul – it’s just not worth us risking our reputation.