Diamelys Journal

Metal, profile, width, wearing order: all the tips for matching your wedding ring and your lab-grown diamond or synthetic diamond engagement ring.

IGI report number, laser inscription, online verification: how traceability guarantees the authenticity of your lab-grown or synthetic diamond.

White gold, yellow gold, or rose gold: how to choose the metal for your IGI lab-grown or synthetic diamond ring. Diamelys complete guide.

Round, oval, emerald, cushion, pear: how to choose the ideal lab-grown diamond shape for your engagement ring. Complete Diamelys guide.

IGI certification, return policy, transparent prices: everything you need to check before buying a lab-grown or synthetic diamond online. Diamelys Guide.

Most brands that sell lab-grown diamonds only talk about their advantages. At Diamelys, we prefer to give you a complete picture — including the limitations. Because a well-informed purchase is always a better purchase. Advantages A significantly more accessible priceThis is the most tangible advantage. For the same quality — same 4Cs, same IGI certification — a lab-grown diamond costs between 40% and 70% less than a natural diamond. In concrete terms, this means: access to a size or quality that your budget would not allow for natural diamonds. Identical quality and brillianceA lab-grown diamond is a real diamond. Same chemical composition, same hardness, same brilliance. With identical 4Cs, no one — not even a gemologist — can tell the difference with the naked eye. IGI certification confirms this with the same criteria as for a natural diamond. Total traceabilityEach Diamelys diamond comes with an IGI certificate with an online verifiable report number. You know exactly what you're buying: weight, color, clarity, cut quality. No ambiguity. Access to rare sizes and colorsIn natural diamonds, a 5-carat D-color diamond or a quality pink diamond represents considerable budgets, or are simply impossible to find. In the lab, these stones become accessible — opening up creative possibilities that traditional jewelry usually reserves for the largest budgets. Consistency with modern valuesNo mining, no opaque supply chain, no risk of conflict diamonds. For those for whom these issues matter, the lab-grown diamond offers a clear and verifiable answer. Limitations Low resale valueThis is the most frequently cited limitation. It's true that the secondary market for lab-grown diamonds is still young and not well structured. Social perception can still varyIn some circles, natural diamonds remain a strong marker. Some families, cultures, or generations attach symbolic importance to the geological origin of the diamond. This is not irrational — it's a matter of values. If this context concerns you, it's something to consider. The market is evolving rapidlyThe prices of lab-grown diamonds have changed in recent years and will likely continue to do so. This is not a problem for someone buying a piece of jewelry to wear. It is to be considered if one attaches importance to heritage value. Our position At Diamelys, we believe that transparency is the best form of trust. The lab-grown diamond is not perfect for everyone — but for those looking for a real certified diamond that is beautiful, durable, and accessible, it is currently the best option on the market. The advantages far outweigh the limitations — provided you know exactly what you're buying. Frequently asked questions Is the main drawback really the resale value?This is the most frequently cited limitation. But it should be remembered that natural diamonds also depreciate sharply on resale. The real question is: are you buying a piece of jewelry or a financial investment? Will a lab-grown diamond still be recognized in the long term?Yes. It is a true diamond in the gemmological sense. It will be certifiable, identifiable, and transferable exactly like a natural diamond. Its lab origin will never erase its physical properties. Will my loved ones see that it's a lab-grown diamond?No, not with the naked eye. If you choose to mention it, that's your decision. Visually, it is indistinguishable from a natural diamond of the same quality. Why does Diamelys also talk about the disadvantages?Because we believe that a well-informed customer makes a better purchase — and remains satisfied in the long term. Do you have questions about a particular diamond? Our team will answer you →

They both sparkle, they look alike at first glance, and they are often mentioned together. Yet, lab-grown diamonds and moissanite are two very different materials — and the choice between them deserves clarification. Moissanite: what exactly is it? Moissanite is composed of silicon carbide (SiC). It was first discovered in 1893 in a meteorite crater in Arizona — an extremely rare natural curiosity. Today, all moissanite sold in jewelry is synthesized in a laboratory. It is not a diamond. Nor is it a cheap imitation. It is a material in its own right, with its own properties — different from those of a diamond. Composition: a fundamental difference A lab-grown diamond is composed of pure crystallized carbon — exactly like a natural diamond. It is this structure that gives it a hardness of 10/10 on the Mohs scale, the maximum value, and permanent durability. Moissanite is composed of silicon carbide. Its hardness is 9.25/10 — very close, but not identical. In daily use, the difference is minimal. That's not where the real distinction lies. Brilliance: similar but recognizable This is where the difference becomes visible. Moissanite has a higher dispersion index than diamond — meaning it produces more colorful rainbow effects in bright light. For some, this is attractive. For others, this sparkle is perceived as too intense, too glittery, sometimes described as artificial. Diamond produces a white sparkle, more classic, more discreet in its brilliance. It's a matter of taste — but it's a real difference that many people perceive, even without being able to name what they see. Certification: a decisive point A lab-grown diamond can be IGI or GIA certified according to the same criteria as a natural diamond: carat, color, clarity, cut quality. This certificate is an official gemological document, verifiable online, with a laser-inscribed number on the stone. Moissanite is not certifiable by these organizations. It may come with a manufacturer's certificate — but this is not the same as an independent gemological certification. At Diamelys, every diamond comes with its IGI certificate. This is your guarantee that you are buying a real diamond, with verifiable and objective characteristics. Price: the advantage of moissanite Moissanite costs significantly less than a lab-grown diamond — often five to ten times less for an equivalent size. This is its main appeal. That said, lab-grown diamonds already cost 40 to 70% less than an equivalent natural diamond. The price difference between moissanite and lab-grown diamonds is real, but it must be considered in light of what you are actually buying: a simulant on one hand, a real certified diamond on the other. Which to choose? If your absolute priority is the lowest possible budget for a visual effect close to that of a diamond, moissanite may be suitable — especially for jewelry worn occasionally. If you want a real diamond, certified by an independent organization, with classic brilliance and maximum durability, a lab-grown diamond is the answer — at a much more accessible price than a natural diamond. Both are legitimate choices. What is not acceptable is to confuse them — or worse, to sell one for the other. Frequently Asked Questions Is moissanite a diamond?No. Moissanite is composed of silicon carbide (SiC), while a diamond is pure crystallized carbon. They are two distinct materials with different properties. Can you tell the difference between moissanite and a diamond with the naked eye?Often yes, in bright light. Moissanite produces more pronounced rainbow flashes than a diamond. A trained eye will notice it, even without equipment. Is moissanite IGI certified?No. IGI and GIA only certify diamonds. Moissanite may come with a manufacturer's document, but it is not an independent gemological certification. Is there a significant price difference between a lab-grown diamond and moissanite?Yes. Moissanite is generally five to ten times cheaper. But lab-grown diamonds are still 40 to 70% cheaper than natural diamonds — which already makes them a very accessible option for a real certified diamond. Questions about our IGI-certified lab-grown diamonds? Our team is here to help →

Cubic zirconia or lab-grown diamond: durability, brilliance, certification, price. Everything you need to know to tell the difference and make the right choice.

Composition, price, brilliance, resale, ethics: all the differences between lab-grown and natural diamonds. The honest guide to choosing in 2026.

Discover why lab-grown diamonds are transforming modern jewelry: a true IGI-certified diamond, customizable and tailored to today's expectations.

Over the past few years, lab-grown diamonds have progressively established themselves in the world of jewelry. At Diamelys, we believe that any jewelry purchase should always be accompanied by clear and transparent information. Here is everything you need to know about lab-grown diamonds.