I'm not an expert by any means, I just know what I've read here. From what I've learned, I think the white spots are where light leaks through (so there's less light return) and the red is where light is reflected back up from the diamond (so the more red the better). I'm not sure if light leakage is typical for this cut, but I know that the redder, the better! Good luck - someone correct me if I'm wrong!