While lab created diamonds may be physically identical to mined diamonds, they come with a much higher price tag. The main reason for this is that the process of creating them is still quite new and expensive. Additionally, lab grown diamonds are in limited supply, which also contributes to their high cost. For now, those wanting a diamond will likely have to pay a premium for a CVD diamonds one. However, as the technology improves and becomes more widespread, the price of these diamonds is likely to drop.