I am purchasing an oval diamond wholesale(I am a buyer at America's Mart).It is E color, SI2, and 1.0 carat.It is beautiful and I have looked at it closely-although I really don't know what I am doing.Could you tell me if the dimensions sound good?It is 7.2 X 5.2 X 4.1 mm.I am paying around $2650.I feel good about the purchase, but would like your opinion.It is not certified.Thank you.