The price of lab grown diamonds is significantly lower than the price of mined diamonds. The exact price difference will depend on various factors such as the size, quality, and specific type of diamond, but on average, lab grown diamonds are around 75% cheaper than natural diamonds. This is because the cost of producing rough lab grown diamonds is much lower than the cost of mining and extracting rough natural diamonds from the Earth. However, the rest of the process that a rough diamond, whether from a mine or a lab, goes through to be retail ready, like cutting, polishing, certification, are all exactly the same. To give you an idea of how much you can save, if a mined diamond costs £10,000, an equivalent lab diamond will cost £2,500.