Diamond Shopping Tips
Look for a certified stone.
Buy a diamond that comes with a certificate from the Gemological Institute of America or the American Gem Society. That way, you know exactly what you're getting.
Find out the refund policy.
Make sure the store has a written cash refund policy.
Get the diamond appraised.
Immediately after you purchase the diamond, take it to a qualified diamond appraiser.
ABC News consumer correspondent Elisabeth Leamy originally reported this story for "Good Morning America Weekend Edition."