We are very happy with IGI for lab diamonds, in general. In the case of this stone, we agree that its color is colorless - E color works. Also... she's a clean baby! Legit VS1 clarity, yes. I do differ in how I would categorize the cut. It is actually "Cushion Modified Brilliant" A really nice one at that! It's got a combination of small sparkles (crushed ice) and some larger flashes and fire too! Really nice rectangular shape. Colorless and clean. Nicely priced too!