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Lab-Grown Diamonds

With state-of-the-art technology, Stuller provides confidence and transparency with every lab-grown diamond purchase.

What Are Lab-Grown Diamonds?

Lab-Grown Diamonds are optically, chemically, and physically, identical to natural diamonds and are created in a lab by scientists. Lab-grown diamonds provide the same luxurious diamond at flexible price points to fit anyone’s lifestyle. Lab-grown diamonds also offer the opportunity of a larger carat weight at lower costs.


Indistinguishable from the naked eye, lab-grown diamonds present the same visible qualities as their natural counterparts.


Lab-grown diamonds are not simulants. They are formed from rough crystals taking an average of 2–4 weeks.


To confidently tell lab-grown and natural diamonds apart, advanced instruments are needed to detect the physical aspects.

What Is The Difference Between Lab-Grown And Natural Diamonds?

Diamond Natural Lab-Grown
Chemical Composition Carbon Carbon
Crystal Shape Octahedron Cuboctahedron/Cube
Refractive Index 2.42 2.42
Dispersion 0.044 0.044
Hardness 10 10
Density 3.52 3.52
Inclusions/Blemishes Yes Yes

What Are The Benefits Of A Lab-Grown Diamond?

Adding lab-grown diamonds to your offering can increase diamond sales and give customers a new selection to best fit their needs.

According to consumer research from The MVEye, a market research and strategic consulting firm within our industry, lab-grown diamond awareness and education is consistently increasing.*

With Stuller’s excellent selection of loose lab-grown diamonds in a variety of sizes, shapes, and qualities, you can feel confident in meeting the demands of your customers with limitless options for a successful sale. Browse all in-stock options for lab-grown diamonds available with and without a grading report — rigorously tested and screened with your reputation in mind — and extend confidence to your customers with every request.


of shoppers are shown to increase their budget when they are given the option to select a lab-grown diamond that is larger in size compared to natural diamonds.


of retailers are now offering lab-grown diamonds as an additional choice.


higher margins seen by retailers in lab-grown sales when compared to natural diamonds.

*For more information on consumer habits and industry trends with lab-grown diamonds, view this report by The MVEye.

Lab-Grown Diamond

Benefits of Lab-Grown Diamonds with Reports

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All Lab-Grown Diamonds are hand selected and individually graded.

How Are Lab-Grown Diamonds Created?

Lab-Grown Diamond manufacturers operate in highly controlled lab environments using one of two methods: High Pressure High Temperature (HPHT) or Chemical Vapor Deposition (CVD).

Both processes begin with a diamond seed and result in a Lab-Grown Diamond. During the HPHT method, the scientist places the diamond seed in a growth chamber (apparatus), heats it to 2,700–3,100 degrees Fahrenheit, and exposes the seed to a pressure of 725,000 pounds per square inch, similar to the process that takes place in Earth’s mantle. The diamond seed remains under these intense conditions for varying lengths of time.

The CVD method of Lab-Grown Diamond creation begins with flat diamond slabs placed in a reactor. The reactor is injected with Methane gas. The gas is exposed to microwaves which cause it to break down into its comprising atoms and generate a carbon-rich plasma cloud. The carbon atoms in the plasma connect with the diamond slabs and create new layers, resulting in slow vertical growth.

Both the HPHT process and the CVD process produce Type IIa colorless Lab-Grown Diamonds, equal to some of the rare and sought-after types of Natural Diamond. These processes can also be adjusted to produce colored Lab-Grown Diamonds.

Shop Lab-Grown Diamonds

Melee Diamonds

Large Lab-Grown Melee Diamonds
  • Available in 13 standard shapes and 4 shapes of matched pairs — all in a variety of sizes up to 0.25 carat.
  • Round lab-grown melee diamonds are sold in tight tolerances (+/- 0.05mm).
  • Housed in a completely separate vault from natural melee diamonds.
  • Stored and shipped in distinct, blue parcels for easy recognition.
  • Handled separately from natural diamonds.

Lab-Grown Diamonds

Without Grading Report

Large Lab-Grown Diamonds without grading report
  • Sizes ranging from 0.33 carat to 3.00 carat in select sizes.
  • Comes in a variety of colors including F+, G-H, and I-J.
  • Available in VS, SI1-SI2, and I1.
  • Each lab-grown diamond is inscribed with "Lab-Grown" on the girdle.
  • New millimeter calibrated options available in seven shapes. Shop calibrated sizing.

Lab-Grown Diamonds

With Grading Report

Pink, yellow, and white Lab-Grown diamonds
  • Sizes starting at 0.50 carat.
  • Available in fancy colors, such as blue, pink, and yellow.
  • Stored and shipped in a distinct, blue box.
  • Includes GCAL certificate or IGI report.
  • GCAL 8X® Ultimate Cut Grade Lab-Grown Diamonds achieve excellent grades in all eight aspects of cut quality.

Why Diamond Screening is Important

At Stuller, we are dedicated to providing complete confidence and proper disclosure with every lab-grown diamond purchase. Our stringent screening procedures and zero-tolerance approach ensure that all businesses uphold their reputation while building trustworthy customer connections.

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Modern Brilliance®

Discover achievable elegance with Stuller’s lab-grown diamond jewelry collection.

Diamond Screeners and Testers

Invest in equipment that extends complete confidence to you and your customers.

The Four Cs of Lab-Grown Diamonds

Diamonds are among the most coveted gems. To determine a diamond’s value, experts use the Four Cs - Cut, Color, Clarity, and Carat Weight. To a great extent, cut, color, and clarity depend on the quality of the rough diamond. This is the same for a lab-grown diamond.

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While cut does describe shape, when discussing the 4 Cs it refers to the overall proportions and finish of the diamond as well. A diamond’s overall proportions, as well as size and position of its facets result in the overall cut. Consistency and balance of these can greatly affect how the stone captures light and reflects it back to the eye.



One factor that determines the value of a diamond is its color. With the exception of fancy-colored diamonds, the most valuable diamonds are those with the least color. Although many people think of gem quality diamonds as colorless, completely colorless diamonds are very rare. The diamond color scale ranges from D (colorless) to Z (light yellow or brown).


A diamond’s clarity is measured by the existence or absence of visible imperfections. Tiny surface blemishes or internal inclusions, even those seen only under magnification, can alter the appearance of the diamond and thus affect its value. Clarity levels begin with flawless (FL, IF), followed by very, very slight (VVS1, VVS2), very slight (VS1, VS2), slightly included (SI1, SI2), and included (I1, I2, and I3).



One carat, the traditional unit of measurement for diamonds, is approximately 0.2 grams. You may also hear the weight of a diamond referred to in points. One carat is equivalent to 100 points, so a 75-point diamond is equal to 0.75 carats. Because they are rarer, larger diamonds have a greater value per carat, so the price of a diamond rises exponentially to its size.


Stuller Diamond Tolerance Charts

Stuller Diamond Weight Conversion Chart


What is the benefit of buying lab-grown diamonds?

Lab-grown diamonds offer customers an opportunity to buy a larger or higher quality diamond at an attainable price point.


How do I care for loose lab-grown diamonds?

Lab-grown diamonds have the same chemical composition as natural diamonds and should be treated and cared for in the same way. All diamonds, mined and lab-grown, are rated excellent for everyday wear.

What is the difference between lab-grown diamonds and Moissanite?

Lab-Grown Diamonds are made of carbon, which is identical to natural diamonds. Diamonds (natural and lab-grown) have a hardness of 10 according to the Mohs hardness scale. Moissanite, on the other hand, is made of silicon carbide and has a hardness of 9.25.


How do I tell if a lab-grown diamond is real?

Lab-grown diamonds are real diamonds. They are made up of a single element, carbon, just as their natural counterparts and have the same optical and physical properties. Advanced testing and screening are needed to distinguish between lab-grown diamonds and natural diamonds.

What is the difference between a natural diamond and a lab-grown diamond?

The only difference between a natural diamond and lab-grown diamond is how they are grown. Natural diamonds are grown and found in nature with little to no human intervention. Lab-grown diamonds, on the other hand, are grown in a lab with the help of scientists.


What are the 4C's of lab-grown diamonds?

Lab-grown diamonds have the same four Cs as natural diamonds: Cut, Color, Clarity, and Carat Weight. Learn more about the 4C's of lab-grown diamonds.

12/7/2023 Market Prices:
Gold 2026.90 Platinum 922.00 Silver 23.91