Grown in the USA

Marks Jewelers understands that knowing your diamond's origin is important. All of our PureMark Diamonds are grown right here in the United States. Our state-of-the-art growing facility partner, Clarity, proudly operates in Austin, Texas.

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Patented Growing Process

Each diamond is grown via the CVD process, but our CVD process is different – our diamonds are Single Growth As Grown. This process uniquely mimics how a diamond grows in the earth without interruption.

The result is a diamond that grows free of visible growth lines with a bright, natural color without post-growth treatments. This single growth process, combined with superior cutting, is why your PureMark Diamond, powered by Clarity, is unparalleled.

Why Choose PureMark?

Superior Cut

See why our diamonds sparkle brighter

Absolute Origin

Know your diamonds unique story

GIA Graded

Assurance from a trusted source

As Grown Promise

Learn why not all diamonds are grown equal

Want to know more about lab-grown diamonds?

Check out our frequently asked questions!

Frequently Asked Questions

  • In today's world, "real" is a vague term like "genuine" which have been disallowed when describing things like diamonds. The Jewelers Vigilance Committee and the various diamond organizations require a diamond to be referred to as follows: mined diamonds are of a natural origin (occurring organically in nature) while synthetic diamonds, also known as lab-grown (preferably laboratory-grown), are grown from a diamond "seed" in a laboratory replicating the intense heat and pressure of mother nature. In truth, it is another mineral all together that looks like diamond, but is neither natural carbon or synthesized carbon. Laboratory-grown diamonds are diamonds in the sense of being crystalized carbon.

  • A laboratory-grown diamond is chemically, optically, and physically the same as a mined diamond - the difference occurs in how they were created. Formed through CVD or HPHT, the growing process is complete in as little as a few weeks, and then it is cut and polished to be used in jewelry, whereas mined diamonds were formed billions of years ago deep under the surface of the Earth.

  • Laboratory-grown diamonds are less costly than their natural counterparts – and the difference is increasing. Their worth is what the marketplace says it is, and recently it is viewed as a depreciating asset. As it is a product that can be manufactured, supply and demand dynamics have had a downward pressure on their pricing (nearly the opposite effect of naturally mined diamonds). With that said, worth is not always measured in dollars and cents. In many cases, consumers prefer to own a quality that would otherwise be unaffordable, opting for immediate gratification. With the stable nature of the mined diamond market, we offer a 100% price guarantee on trade-ins, while there is no trade-in policy for laboratory-grown diamonds.

  • A laboratory-grown diamond is synthesized carbon, born of a process called "Chemical Vapor Deposition" or "Carbon Vapor Deposition", where carbon atoms rain down on a diamond "seed" while in a highly pressurized, highly heated vessel. Or, the diamond "seed" can be placed in an appliance with a carbon-rich environment of intense heat and pressure.

  • The benefits of a laboratory-grown diamond, in a size of 1 carat or more, allows the buyer to purchase a larger diamond and/or a better quality diamond, for dramatically less, from one-tenth to one-third of the price of their mined counterpart. Short of not being able to trade it in for an upgrade, it affords the purchaser all the reflection and refraction of the natural diamond. Further, though all natural diamonds within Marks Jewelers are from diamantaire-partners who comply with the Kimberley Process, meaning they are not from a conflict-laden country, as less than 1% of diamonds are, the laboratory-grown diamonds are 100% conflict-free. The disadvantages are simply that a laboratory-grown diamond's value reduces each and every day. It is not an appreciating asset.

  • The principal difference between laboratory-grown and naturally mined diamonds is their innate value. A laboratory-grown diamond is a technological marvel originating around 1951, taking several generations to get it large enough and of a quality acceptable for fine jewelry. As their production results from technology, laboratory-grown diamonds are a depreciating asset - worth less today than yesterday. However, they allow the purchaser to buy larger and/or better quality without the expense of a naturally mined diamond. Naturally mined diamonds have value reflective of it being a completely natural product, a product born 1 billion years ago to as much as 4 billion years ago, 75 to 125 miles beneath your very feet. Natural diamonds have a finite supply. Mines once plentiful are beginning to exhaust, without equivalent new mines coming online to take their place.

  • Diamond testers do not test for it being a diamond or not. Rather, they test for being naturally mined, laboratory-grown, or an imitation. There are differences between naturally mined and laboratory-grown diamonds in their growth patterns, reactions to ultraviolet light, and internal characteristics. In short, diamond testers will identify that it is a lab-grown diamond save for an extremely small margin of error.

Documented Quality

Each PureMark Diamond's girdle is laser inscribed with the term "Laboratory-Grown," the Clarity logo, and the GIA report number. The GIA grading report provides information on the diamond's 4Cs. We also offer the AGS Ideal® Report by GIA on all round diamonds, providing a light performance grade by analyzing the diamond's ability to absorb and return light (sparkle!).

Committed to the Environment

Our commitment to the environment begins with us producing our product with a concern for human and environmental well-being. We have responsible management practices for power, water, chemicals, and waste materials. Additionally, our power is nearly 50% carbon-free: mostly wind, some solar, and hydroelectric. It isn’t 100% yet — but our goal is to be completely carbon-free in the very near future!

Our manufacturing facility is a state-of-the-art facility, outfitted with the most modern machinery and equipment. Our staff are master cutters and polishers, many who have been with the company for decades. Our factory houses a polishing school and all of our employees are provided with extensive training and support. The factory is certified to the highest standards and we are proud to share our vision with our colleagues.

Contact us now to find out more about PureMark.

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