From variations in cut, clarity, color, and carat to the shape and unique flaws, every stone has its own story to tell. Zales offers jewelry made with all types of diamonds, including natural, lab-created, and a range of colored diamonds.

Costco offers our members high quality jewelry at an exceptional value. Our team of GIA Graduate Gemologists inspect every diamond to ensure it meets Costco's strict quality standards. We only sell natural and untreated diamonds.

The price you're offered for your diamond can also vary hugely depending on how you choose to sell it. We've covered these reasons in more detail below. In most cases, a diamond engagement ring or other diamond jewelry will have a resale value of between 20 and 60% of the amount it cost when it was new.