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Discover Lab-Created Diamonds by KAY - Shop Fashion and Bridal styles

Your guide to lab-created diamonds


The best of both worlds, our lab-created diamonds allow you to maximize your budget while getting a big, bold look. Like all KAY diamonds, they’re 100% conflict-free and expertly crafted. There’s a stunning style for every love. Explore our collection to find yours.

What are lab-created diamonds?


Lab-created diamonds (also known as lab-grown or man-made diamonds) are made in a laboratory and are an exceptional mix of master craftsmanship and science—in fact, they have the same optical, chemical, and physical properties as natural diamonds. The core differences are the time they took to form and their origin.

Image of lab-created and natural rough diamonds

Lab-Created Diamonds vs. Natural Diamonds


Learn more about the differences between lab-created diamonds and natural diamonds, so you can find the diamond option that’s right for you. With over 100 years of experience, we know diamonds. We believe that diamonds are right for everyone, but everyone may have a different idea as to which diamond is right for them. At KAY, our goal is to help you determine the best diamond to meet your needs.

KAY Diamond Comparison Natural Diamonds Lab-Created Diamonds
Is it a Diamond? Yes Yes
Primary Chemical Composition Carbon Carbon
Source The Earth A Laboratory
Time to Create 1 to 3 Billion Years Several Weeks to Months
Supply/Rarity Finite and Rare Unknown at this time
Independently Certified Yes* Yes*
100% Conflict-Free Yes Yes
KAY Responsible Sourcing Commitment Yes Yes
Likely to maintain long-term value Historically, yes Unknown at this time
Included in the Lifetime Diamond Commitment Yes Yes
Eligible for Upgrades Yes+ Yes+
Price Comparison (of comparable quality and size) $$$ $$

*Select styles & carat weights

+Natural diamonds can only be traded-in for natural diamonds and lab-created diamonds can only be traded-in for lab-created diamonds.

Explore lab-created diamonds by KAY

Why choose lab-created diamonds?

  • Independently Certified

    All Lab-Created Diamonds by KAY are independently certified for quality.

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  • 100% Conflict Free

    All diamonds sold at KAY—both natural and lab-created—are totally conflict free.

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  • Lifetime Diamond Guarantee

    Discover how KAY keeps you covered with our Lifetime Diamond Guarantee.

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  • Retail Locations Nationwide

    Visit your local KAY to see stunning lab-created diamonds in person.

    Find Your KAY

Lab-Created Diamonds FAQs


From how they’re made to quality and value, get answers to your most frequently asked questions about lab-created diamonds here.