Search for information: Buying engagement ring is like a big investment just like buying a car. Buying an engagement ring online pose a much more risk and challenge. First of all there is that fear that what you order and paid a fortune for might not be exactly what you saw on the pictures and it might be the wrong size and fit. Blue Nile has done a great job answering these questions, for somebody like myself, I do a lot of research on a product and read customer reviews before buying it. Blue Nile has the Guide and education tab on their web site which educates customers on how to chose their rings and gems. The 4Cs video is very educative. It tells the customer what they are buying. The Blue Nile website provides ample information for prospective customers.