We set high standards for our jewelry sourcing—whether natural or lab-created, 100% of our diamonds are conflict-free. Check out more reasons to choose KAY here. All lab-created diamonds are independently certified for color, clarity, cut, and carat weight.

Fancy color diamonds are graded Z and higher. Most KAY diamonds are graded "near colorless" - between G and J on the color scale. At a J grade and beyond, the human eye can start to detect a yellow tint.

Few Things to Remember We can't return or compensate you for any diamonds or color stones you send. We only accept used jewelry; not anything new or that appears to be new. Don't send investment metals - ingots, coins, bullion or bars. We do accept dental gold, scrap gold, gold flakes and gold nuggets.

We guarantee 100% trade-in value of diamond* jewelry purchased at KAY towards a new piece. Your next selection must meet the minimum requirement of at least double the trade-in value. To ensure your peace of mind, our Jewelry Experts utilize an automatic Trade-In Evaluation System. Exclusions may apply.