The Earth Star Diamonds team want you to enjoy your jewelry without fear or wonder. Owning a diamond is a precious experience if owned without doubts.
The most obvious way to ensure that a diamond is real is to keep the certificate from the GIA or AGS that guarantees that the stone is genuine. However, as time passes and paperwork is mislaid, you may need other means of seeking corroboration that your diamond jewelry is real. Indeed, if you are looking to buy diamond jewelry, then you have the right to doubt and therefore to check the validity of the stone.