Understanding Lab-Grown Diamonds
A clear guide to how lab-grown diamonds are created, evaluated and documented—and how cut, color and light performance shape the way a diamond appears.
01
Understanding Lab-Grown Diamonds
Lab-grown diamonds are diamonds created in a controlled environment using technology that enables diamond crystal growth. They have the same fundamental chemical composition, crystal structure and optical characteristics as mined diamonds. Their primary difference is origin: one grows in a laboratory or production facility, while the other forms naturally within the earth.
Because lab-grown diamonds are diamonds—not look-alike materials—they can be evaluated using the same core quality factors applied to mined diamonds, including cut, color, clarity and carat weight. Their appearance and value still vary from stone to stone.
The term “lab-grown” describes how the diamond was formed. It does not, by itself, determine the diamond’s grade, beauty or suitability for a particular piece of jewelry.
02
Lab-Grown vs. Mined Diamonds vs. Diamond Simulants
Lab-grown and mined diamonds are both diamonds; diamond simulants are different materials chosen to resemble a diamond. The distinction matters when comparing composition, durability, optical behavior and documentation.
| Characteristic | Lab-Grown Diamond | Mined Diamond | Diamond Simulant |
|---|---|---|---|
| Material | Diamond | Diamond | A different material, such as cubic zirconia or moissanite |
| Formation | Created through a controlled growth process | Formed naturally within the earth | Manufactured or naturally occurring, depending on the material |
| Core properties | Diamond’s chemical, crystal and optical properties | Diamond’s chemical, crystal and optical properties | Properties vary by material and are not identical to diamond |
| Quality evaluation | May be evaluated using the 4Cs | May be evaluated using the 4Cs | Evaluated according to the relevant material |
A product described as moissanite, cubic zirconia or another simulant should not be represented as a lab-grown diamond. Always review the individual product page for the stated center stone and supporting documentation.
03
CVD and HPHT: Two Diamond-Growth Methods
CVD and HPHT are the two principal methods used to grow diamonds in controlled environments. Both can produce diamond crystal, but they use different conditions and growth mechanisms.
CVD
Chemical Vapor Deposition begins with a thin diamond seed placed in a chamber containing carbon-rich gas. Energy activates the gas, allowing carbon atoms to accumulate on the seed and build diamond crystal layer by layer.
HPHT
High Pressure High Temperature growth places a diamond seed and a carbon source under very high pressure and temperature. Under these conditions, carbon crystallizes around the seed and forms a diamond.
The growth method alone does not establish a diamond’s final quality. Cut, color, clarity, carat weight and the characteristics of the individual stone must still be considered.
04
The 4Cs and Light Performance
The 4Cs describe key diamond characteristics, while light performance describes how effectively a finished diamond interacts with light. The two perspectives are related, but they are not interchangeable.
Cut
The quality of the diamond’s proportions, symmetry and polish, and how those choices influence its appearance.
Color
The presence or absence of body color, assessed within the grading system appropriate to the diamond.
Clarity
The presence, position and visibility of internal characteristics and surface features.
Carat
A measure of diamond weight. Carat weight is not a direct measure of face-up size or visual impact.
Brilliance The return of white light seen from the diamond.
Fire Flashes of spectral color produced as light is dispersed.
Scintillation The pattern of light and dark, and the sparkle seen as the diamond, viewer or light source moves.
Light symmetry The visual balance and organization of light return across the face of the diamond.
Two diamonds with similar 4C grades can still look different because facet arrangement, proportions and viewing conditions influence their visual character.
05
Certificates and Light Performance Reports
A diamond grading document records assessed characteristics; a Light Performance Report evaluates aspects of how a diamond handles light. They serve different purposes and should not be treated as the same document.
Depending on the individual diamond or jewelry piece, documentation may be issued by IGI, NGTC or GRC. A Light Performance Report may also be provided for selected diamonds. A Light Performance Report is not a diamond grading certificate.
Documentation is not identical across every ffulla product. Review the individual product page for the files stated for that item, or contact ffulla before ordering if you need confirmation.
06
Colored Lab-Grown Diamonds
Colored lab-grown diamonds are diamonds whose visible body color results from conditions or treatments associated with growth and post-growth processing. Their color may be influenced by trace elements, structural features or controlled treatment, depending on the diamond.
Hue, tone and saturation all affect how a colored diamond appears. Cut also matters: facet arrangement and proportions can concentrate, distribute or soften the color visible from the face-up view.
Color descriptions and documentation vary by stone. Refer to the specific product page rather than assuming that two diamonds described with the same general color name will look identical.
07
Round Modified Brilliant: A Different Expression of Light
A round modified brilliant retains a round outline while changing aspects of the facet pattern from a conventional round brilliant. Those changes can create a distinct pattern of brilliance, fire, scintillation and visual symmetry.
At ffulla, Round Modified designs explore how facet relationships can give a familiar silhouette a more individual light signature. The result should be considered on its own visual character rather than judged by outline alone.
“Modified” does not automatically mean better or worse. It identifies a different facet design, and each diamond should be assessed through its proportions, finish, documentation and appearance.
08
How ffulla Uses Lab-Grown Diamonds
ffulla uses lab-grown diamonds across selected engagement rings, wedding rings and fine jewelry. The diamond is considered together with the setting, proportions and intended visual expression of each design.
The collection includes classic diamond shapes, colored lab-grown diamonds and Round Modified designs. Available stone shapes, sizes, colors, materials and documentation differ by product.
Jewelry may be offered in selected options including 18K yellow gold, 18K white gold, 18K rose gold, Pt950 and, for some fine jewelry, plated finishes. Not every product is available in every material. The individual product page is the authoritative source for that item’s specifications and available options.
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Cut For You
Cut For You is ffulla’s approach to exploring a diamond or jewelry design around a personal meaning, including a significant number or story. The process may involve discussion of diamond style, proportions, setting and design direction.
Availability depends on technical feasibility, suitable materials and the requirements of the requested design. A request does not guarantee that every number, cut, size, color or setting can be produced.
Discuss Your Idea10
Frequently Asked Questions
Are lab-grown diamonds real diamonds?
Yes. Lab-grown diamonds have the same fundamental chemical composition, crystal structure and optical characteristics as mined diamonds. Their primary difference is where and how they form.
Are lab-grown diamonds the same as cubic zirconia or moissanite?
No. Cubic zirconia and moissanite are diamond simulants made from materials that differ from diamond. A lab-grown diamond is diamond crystal created through a controlled growth process.
What is the difference between CVD and HPHT?
CVD grows diamond crystal from activated carbon-rich gas, while HPHT grows diamond under very high pressure and temperature. Both methods can produce lab-grown diamonds.
Do all ffulla diamonds include the same certificate?
No. Depending on the individual diamond or jewelry piece, documentation may be issued by IGI, NGTC or GRC. Review the product page or contact ffulla to confirm the documents provided with a specific item.
Is a Light Performance Report a diamond grading certificate?
No. A Light Performance Report evaluates aspects of how a diamond interacts with light. It is separate from a diamond grading document.
Can lab-grown diamonds be colored?
Yes. Lab-grown diamonds can display color influenced by trace elements, structural features, growth conditions or post-growth treatment. The appearance and documentation should be checked for each individual stone.
What does Round Modified Brilliant mean?
It describes a diamond with a round outline and a facet arrangement modified from a conventional round brilliant. The modified pattern can create a different visual expression of brilliance, fire and scintillation.
Can every ffulla design be customized through Cut For You?
No universal customization is guaranteed. Availability depends on technical feasibility, suitable materials and the requirements of the requested design. Contact ffulla to discuss a specific idea.