At Prestar NYC, all our lab-grown diamonds are priced at 800 USD per carat. As we grow the stones to our own specifications, we can price our lab-grown diamonds in a linear way. This means that the price per carat goes up as the size increases, but your price for the consistent high-quality cut, clarity, and color does not. If you want to buy a piece of Lightbox Jewelry (rather than a loose stone) a setting cost is then added to the price of the stone, reflective of the type and amount of your chosen metal.