How do you get the best diamond for the best value? How do you tell
if a diamond is real or a cubic zirconia? How do you know if
you can trust a diamond seller? The Diamond Guy®, Fred Cuellar,
answers those questions and more for thousands of people. Fred is an
internationally-known diamond and jewelry expert with over 20 years
of experience in the jewelry trade. This website is a companion to
Fred’s best-selling book 6th ed. “How to Buy a Diamond.”

National Diamond Helpline: 1–800–275–4047
Help is only a phone call away…

The National Diamond Helpline offers FREE, up-to-the-minute advice,
appraisals, and jeweler selections.

Monday - Friday: 9 a.m. to 5 p.m. CST
Saturday: 9 a.m. to Noon CST