OK here is the deal I was at Blue Nile and found a good rock for an engagement ring I plan on doing very soon, but now after being here I am confused. The rock I been looking at is an H color a VVS2, Ideal cut and Ideal polish and everything. Now I see a lot of people picking up SI1 diamonds, is clarity not so important? I want a rock that sparkles, what should I look at first? Not regarding carat weight; how would you rate importance of a diamond from the 4 C’s