We guarantee that all diamonds supplied by Costco Wholesale have a clarity to be "VS2" or better and color to be "I" or better as outlined by the industry standard in the Gemological Institute of America (GIA) grading guide. Costco sells diamonds with a cut grade of Good to Excellent.

All over the world, India is deemed to be the region where diamonds are found at cheaper rates. This certainly has many other reasons as well.

Antique cuts actually tend to be less expensive than modern cut earth-mined diamonds if and when you can find them. Part of this reason is because they don't require new mining and all of the associated costs that come with that.