Supposedly one of the ways to identify a manufactured diamond (an actual diamond that's made in a factory) is that it's perfect. And yellow, which used to be very rare and therefore very valuable, is one of the more common colours in manufactured diamonds.I would think that if, for some reason, one really a ring aren't the manufactured diamonds cheaper and better?
There had been rumours that the Russians were manufacturing diamonds for years. The way they were found out is somebody turned up with a bag of perfect yellow diamonds. What are the chances?