Jewellery
Lab Grown vs Natural Diamonds: Everything You Need to Know
Reviewed by Thomas & Øyvind — NorwegianSpark | Last updated: April 2026
How Lab Grown Diamonds Are Made
Lab-grown diamonds are produced using two primary methods: High Pressure High Temperature (HPHT) and Chemical Vapour Deposition (CVD). HPHT replicates the extreme conditions found deep in the Earth's mantle, subjecting a carbon source to pressures above 1.5 million pounds per square inch and temperatures exceeding 1400 degrees Celsius. CVD introduces a carbon-rich gas into a vacuum chamber where carbon atoms gradually deposit onto a diamond seed crystal.
Both methods produce diamonds that are chemically, physically and optically identical to natural stones. The process takes days to weeks depending on the desired size and quality. Advances in technology have dramatically improved the quality and size of lab-grown diamonds available on the market, with stones above three carats now readily available through retailers like Brilliant Earth and James Allen.
Price Comparison: How Much Can You Save?
The price advantage of lab-grown diamonds is substantial and continues to widen. In 2026, a lab-grown diamond typically costs 60 to 80 percent less than a natural diamond of equivalent quality. A one-carat, ideal-cut, G-colour, VS1-clarity lab-grown diamond might cost 800 to 1200 dollars, while its natural counterpart could range from 4000 to 7000 dollars. This means you can either save significantly or invest in a larger, higher-quality stone for the same budget.
However, the resale market for lab-grown diamonds remains underdeveloped. Natural diamonds retain approximately 30 to 50 percent of their retail price on the secondary market, while lab-grown diamonds may retain only 10 to 20 percent. For buyers who view an engagement ring as a lifetime purchase rather than an investment vehicle, the upfront savings often outweigh resale considerations.
Quality and Appearance: Can You Tell the Difference?
To the unaided eye, there is absolutely no visible difference between a lab-grown and natural diamond of the same grade. Both exhibit identical brilliance, fire and scintillation. Lab-grown diamonds are graded using the same 4C system by the same independent laboratories, including GIA, IGI and GCAL. A GIA-certified lab-grown diamond has undergone the same rigorous evaluation as a natural stone.
Some lab-grown diamonds may contain different types of inclusions than natural stones, such as metallic flux remnants in HPHT diamonds, but these are generally invisible without magnification and do not affect visual quality. The optical performance of a diamond is determined almost entirely by its cut quality, regardless of origin. Focus on cut grade and proportions rather than origin if maximum beauty is your priority.
Environmental and Ethical Considerations
Lab-grown diamond production avoids the ecological disruption of open-pit mining, which can devastate landscapes, divert waterways and displace communities. A single carat of mined diamond disturbs roughly 100 square feet of land and produces nearly 6000 pounds of mineral waste. Lab-grown production generates none of this physical disruption, though it does consume significant electricity during the growth process.
The ethical landscape of natural diamonds has improved considerably since the implementation of the Kimberley Process and various industry initiatives. However, traceability remains imperfect in some supply chains. Lab-grown diamonds offer certainty of origin, which appeals to ethically conscious consumers. Retailers like Brilliant Earth provide detailed sourcing information for both options, empowering buyers to align their purchase with their values.
Making the Right Choice for Your Situation
Choosing between lab-grown and natural diamonds ultimately comes down to your priorities. If budget efficiency, ethical certainty and stone size are most important, lab-grown diamonds offer extraordinary value. If long-term value retention, rarity and the romance of a stone formed over billions of years matter more to you, natural diamonds remain the traditional choice.
Many couples today take a pragmatic approach: selecting a larger lab-grown diamond for the engagement ring and investing the savings elsewhere. Others prefer the symbolism of a natural stone that has journeyed from deep within the Earth. Neither choice is objectively better. What matters is that you buy from a reputable source, insist on independent certification, and choose a stone that brings joy to the person who will wear it every day.
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Frequently Asked Questions
Can a jeweller tell the difference between lab grown and natural diamonds?
With the naked eye, even experienced gemologists cannot distinguish between a lab-grown and natural diamond of equivalent quality. Both are chemically and optically identical, composed of pure crystallised carbon. However, advanced laboratory equipment can detect subtle differences in growth patterns and trace-element composition. This is why independent grading reports always disclose whether a diamond is natural or laboratory-grown.
Do lab grown diamonds hold their value?
Currently, lab-grown diamonds depreciate significantly after purchase because production capacity continues to expand, driving wholesale prices down over time. A natural diamond of equivalent quality will retain a higher proportion of its original purchase price. However, if your primary goal is a beautiful stone for wearing rather than investment, the savings of 50 to 70 percent at the point of purchase may more than offset the lower resale value, especially since most engagement rings are never resold.
Are lab grown diamonds more ethical than natural diamonds?
Lab-grown diamonds generally have a smaller environmental and social footprint than mined diamonds, though the picture is nuanced. Production requires significant energy, and the carbon footprint depends on the electricity source used by the manufacturer. Natural diamonds from certified conflict-free sources, particularly those meeting the Kimberley Process standards, can also be ethically sourced. Retailers like Brilliant Earth offer both options with detailed provenance information, allowing you to make an informed choice aligned with your values.