Is There a Difference Between Tiffany, Costco Diamonds?

Diamonds are a $30 billion a year business. You can buy a diamond at the mall, at a fancy boutique and even online. With so many merchants selling them, how can you be sure you're getting a good stone at a fair price?

"Good Morning America" shopped at both ends https://www.facebook.com/LeVianJewelry/photos_stream of the spectrum, buying one diamond ring at Tiffany & Co. for $16,600 and one at Costco for $6,600.

Tiffany & Co.All diamonds come from deep within the Earth, but there are lots of different places you can go to get one. We started at Tiffany. We had thousands of diamonds and elaborate settings