Red Box Diamonds

What is a Red Box Diamond®?

Our vendor hand selects the diamonds in the Red Box Diamond® program based on strict criteria for size, quality, and color.  They back these individually graded diamonds with benefits that bring trust, confidence, and security to the diamond buying experience.

Watch the short video to the right for an introduction to Red Box Diamonds®.
Ready to start looking? We have a great selection in-store!
You can also browse our vendor's full selection at the bottom of this page!


All rough and polished diamonds sold by our vendor comply with the Kimberley Process. The Kimberley Process ensures that rough diamonds are:
• Exported and imported with a government validated Kimberley Process certificate stating the diamonds are conflict-free.
• Transported between signatory countries in a sealed and tamper-proof container.
• Sold with a statement from the seller (known as a warranty) on all invoices guaranteeing that the diamonds being sold are conflict-free.


Laser Engraved Identification
Our vendor laser engraves a unique number on the girdle of each Red Box Diamond®. This number matches the grading report, giving you proof positive identification. In addition, you can inscribe a custom message on the diamond for a nominal fee.
Free Loss Protection for One Year
Protecting your purchase is important. All Red Box Diamonds® come with free loss protection for one full year. This provides worldwide coverage against theft, loss, or mysterious disappearance. Your coverage of the Red Box Diamond® begins on the postmarked date of the registration form. There is no deductible. In the event of a loss, follow the instructions provided with your purchase. We will help you take care of the rest.


When you purchase a Red Box Diamond®, rest assured it holds its value. Any loose diamond purchased at CornerStone may be traded back to us, at its full original purchase value, for another diamond of greater value.

There are just as many reasons to buy and benefits of owning a Red Box Diamond® as there are occasions to give them.   We are pleased to offer you this product knowing that it will meet and exceed your expectations of buying and owning a diamond. 

Between our trade up policy and the one year loss protection you can be secure in the knowledge that your best interests come first.  Let us help you celebrate your milestones today!

Come see our current in-store selection today!
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Browse our vendor's full selection of Red Box Diamonds® below!

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Diamonds aren't the only option!
Click below to browse our vendor's full selection of certified colored gemstones!