It's between an Infinity and Union diamond. They are both idea cut, Infinity is suppose to be only the best cuts in the world, but the diamond I can get from Union is ideal AGS0 and much bigger for the same price. (1.2 vs. 1.04). I don't even know if I will notice the difference, but if the Infinity diamond is much sparkier, than I'd go for smaller. But living in Norway I can't really look at them and compare! I am debating purchasing both and having them sent to a friend to compare, and then returning one but that seems like too much of a hassle. I'm leaning on getting the Union one I think. Sometimes I think these signature cuts, and best of the best is a marketing scam to increase the price of the diamond. But then maybe it isn't I don't know?