I'm wondering how much it's worth. I'm keen to sell it and figure as it's Christmas time maybe now is the best time to flog it. It's a lab-grown 1 carat diamond and the colour is F with VVS1 clarity.

So it’s not always easy to understand, or explain, why a 1-carat diamond is worth, say, $6,000, while a 2-carat diamond of similar quality might be worth $15,000. It’s really a simple concept: Large ...