Contributed by FindMyJeweler.com
If you are considering purchasing a diamond from an online vendor, we suggest you first take the time to educate yourself using the Diamonds 101 tutorial, and by reading and posting questions on the Diamond Review Forum.
Once you're comfortable with diamonds and have a good sense of what you want, your next step is to find a reputable online jeweler. Be aware that some extremely low-priced online jewelers are really "basement operations" -- i.e., some guy setting up a website and selling diamonds out of his house with little or no track record.
To find a reputable, established jeweler, we suggest you poke around a bit: