Lady's 14K Yellow Gold 1.00ct Marquise Cut Diamond Ring. Ring Size: 6 1/2 (Can be Resized to Fit Most Any Finger) Contains: 1 Marquise Cut Natural Diamond. Weight: 1.00ct, Color: Near Colorless (H-I), Clarity: SI1/SI2. This is a beautiful ring mounted with classic simplicity. It has all the pluses: It is the important one carat size, it is absolutely clean to the naked eye and it is near colorless. It came to us by way of a private party purchase. I think that the ring would show much better if it were mounted in platinum with some diamond accents. But that would raise the price accordingly. A beautiful ring guaranteed not to disappoint. Our policy with engagement rings is that if she says, "No," you get back your dough.