This ring is 1 karat Heart shaped zircon. That is stunning, Truly, Each and every one of these rings is carefully crafted by hand for machine-like detailing to the cut and the color are outstanding. But you'll have to see for yourself. I practically give them away. Show me someone else with the expertise in engineering so much so you can build whatever you want . These are.adjustable rings therefore one size fits most. The quality of the ring is superb. I guarantee or your money back