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Laboratory-Grown Diamonds FAQ


Laboratory-grown diamonds are a marvel of science and technology. They share essentially the same properties of a natural diamond chemically, physically, and optically. Whether you choose a laboratory-grown diamond or a natural diamond, they each took a different journey to reach your hands.

Many jewelry stores offer laboratory-grown diamonds as another option for their clients. The easiest way to find out is to call your local jeweler and ask them directly. We strongly suggest you speak to an AGS jeweler, as they adhere to strict standards of ethics and business practices—click here to find a jeweler near you.

Laboratory-grown diamonds that carry a report by the AGS Laboratories will have an “LG” in their color or clarity grade that differentiates it as a laboratory-grown diamond.

Like natural diamonds, laboratory-grown diamonds range in price. There are not set prices for laboratory-grown diamonds.


Diamonds formed in the Earth are called “natural diamonds” because their growth occurred over the span of billions of years under the surface of the Earth. Laboratory-grown diamonds carry almost identical characteristics optically, chemically, and physically as natural diamonds, but were grown in high-tech facilities. The scientific definition of diamond is pure carbon crystallized in the isometric system. Both natural and laboratory-grown diamonds are diamonds.

Which one is right for you is a conversation best saved for you, your loved one and a trusted AGS jeweler.

In most cases, it requires expert gemologists with high-tech equipment following specific testing protocols to tell natural and laboratory-grown diamonds apart. It takes a lot of training, experience, and knowledge of diamond growth, chemistry, and optical properties to make a conclusive determination.

For these reasons, before you make your purchase, ask for an AGS Laboratories grading report.

Laboratory-grown diamonds are created in a high-tech facility with a highly-controlled and researched process. They’re most commonly made in two ways: high pressure high temperature (HPHT) press or chemical vapor deposition (CVD). Learn more about the difference between those two processes here.

Read more about laboratory-grown diamonds below.