Never Buy A Diamond Sight Unseen
Two diamonds of a given shape can be exactly the same clarity, exactly the same color and exactly the same carat weight yet, because of differences in optical beauty (brilliance, fire and sparkle), one of the diamonds can be worth 300% more than the other. If two diamonds have the same description, but are priced differently, you should suspect that the reason for the difference is because one diamond has greater optical beauty than the other diamond. The difference in optical beauty and value between two diamonds of identical shape, clarity, color and carat weight can be AMAZING. It is impossible to evaluate the optical beauty of a diamond, or its value, without actually seeing and examining the diamond. You should NEVER buy a diamond sight unseen.