Lab-Created Diamond FAQ

    How are Gemesis lab-created diamonds made?

    Gemesis lab-created diamonds are produced by utilizing two gem-quality diamond creation processes: High Pressure-High Temperature (HPHT) and Chemical Vapor Deposition (CVD). In both processes, a small diamond seed is placed in an environment that contains carbon, the atomic component diamond. Under suitably controlled conditions, the diamond grows, atom-by-atom, layer-by-layer, recreating nature’s process. 

    How do lab-created diamonds and natural diamonds compare?

    Both have the same physical, chemical and optical properties and emerge as rough diamonds. Both have the same hardness, specific gravity, refractive index and dispersion factor; are polished using the same equipment and techniques; and have the same brilliance, sparkle, fire and scintillation. Both are, in fact, diamond.

    Lab-created vs. Mined Diamonds

    How do lab-created diamonds and diamond-like materials compare?

    They don't. Cubic zirconium, moissanite, and diamond-coated materials, are not diamond. These are called "simulants" in the industry. These materials have completely different physical properties compared to diamond.

    Diamonds vs. Simulants

    If lab-created diamonds are the same as mined, why are the terms "cultured" and "laboratory-created" used?

    Gemesis Diamond Company wants to be absolutely certain that it distinguishes diamonds created by man from those grown in nature. The terms/descriptors:

    -"Laboratory-created," "lab-grown" or "man-made" diamonds all appropriately describe Gemesis created diamonds. 

    -"Cultured" has been used for many years to describe commodities that are engineered by man. That is, where man has found a way to recreate nature's process, so it is a fitting term to describe Gemesis diamonds. Though according to the Federal Trade Commission (FTC), it must be used in conjunction with Gemesis created, laboratory-created, or lab-grown. 

    Is the term "synthetic" an accurate term to describe lab-created diamonds?

    No. While this term is often used, Gemesis believes it can lead consumers to think the diamonds are fake, artificial or simulants such as cubic zirconia, which is inaccurate. The FTC has acknowledged the term synthetic can be misleading to the consumer when describing man-made diamonds. According to the FTC, "the term is a potentially confusing term, i.e., consumers associate synthetic gemstones with imitation stones." The FTC determined that "these other terms ('laboratory-created,' 'laboratory-grown,' '[manufacturer-name]-created') would more clearly communicate the nature of the stone."

    Furthermore, synthetic, as an adjective, is defined as: “made artificially by chemical synthesis, especially so as to resemble a natural product.”  The term synthesis is defined as: “the formation of compounds through one or more chemical reactions involving simpler substances." Lab-created diamonds are NOT created by a chemical reaction of two or more simpler substances, but by crystal growth process, atom by atom, the same as in nature. Therefore, by definition, lab-created diamonds are not synthetic.

    Is the process patented?


    How big are the diamonds sold on

    Gemesis lab-created colorless diamonds are currently offered in sizes ranging from .50 to 1.50 carats.

    Gemesis lab-created fancy yellow color diamonds are currently offered in sizes ranging from .75 to over 2.5 carats.

    What is the quality of diamonds sold on

    Very high-quality. The cut, color and clarity of both our colorless and fancy yellow color diamonds are consistent with the top-tier of mined diamonds. And, in fact, all Gemesis lab-created colorless diamonds are Type IIa, which is the purest form produced in nature and accounts for only 2% of the global production of mined diamonds. 

    Are your diamonds graded?

    Yes. Gemesis lab-created diamonds are graded to the same specifications as mined diamonds by leading independent gemological institutes.

    What is the appraisal process?

    If one is needed, it is important customers take their diamond and/or jewelry to an experienced and accredited gem and jewelry appraiser. An example is the International Gemological Institute (IGI), where all IGI appraisers are accredited members of the American Society of Appraisers (ASA).