Laboratory-Grown Diamonds FAQ
What are laboratory-grown diamonds?

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.

Where can I buy a laboratory-grown diamond?

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.

How much are laboratory-grown diamonds?

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

Are laboratory-grown diamonds really 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.

How can you tell the difference between natural and laboratory-grown diamonds?

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.

How are laboratory-grown diamonds made?

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.


Mission Statement

The American Gem Society (AGS) is a nonprofit trade association of fine jewelry professionals dedicated to setting, maintaining and promoting the highest standards of ethical conduct and professional behavior through education, accreditation, recertification of its membership, gemological standards, and gemological research.

The Society is committed to providing educational products to inform and protect the consumer and to contributing to the betterment of the trade by creating industry standards to protect the jewelry-buying public and the fine jewelry industry as a whole.

AGS Laboratories, founded to support the AGS mission, is a nonprofit diamond grading laboratory with a mission of consumer protection. Adhering to the AGS Diamond Grading Standards, AGS Laboratories is dedicated to offering diamond grading reports that provide consistency and accuracy based on science.

American Gem Society