If you've started shopping for a diamond, you've probably run into this question fast: lab grown or natural? Both are real diamonds, both are graded the same way, and both can look identical to the naked eye. But there are real differences worth understanding before you decide, in how they're made, what they cost, and what happens to that value over time.
The short answer
Lab grown and natural diamonds are the same material, and the same laboratories grade them against the same scale. A lab grown stone of matching size and quality costs substantially less, which is why someone choosing an engagement ring on a fixed budget usually ends up with a larger or better stone by going lab grown. Natural diamonds hold their resale value more reliably. Neither is a compromise, and the certificate is what tells you which one you are holding.
What is a lab grown diamond?
A lab grown diamond is grown in a controlled environment using one of two processes: HPHT (High Pressure, High Temperature) or CVD (Chemical Vapor Deposition).
HPHT recreates the conditions found deep underground: a small diamond seed is placed with a carbon source and exposed to extreme heat (around 1,500°C) and pressure (over 1.5 million pounds per square inch) until carbon atoms bond to the seed and grow a larger crystal.
CVD works differently. A diamond seed is placed in a sealed chamber filled with carbon-rich gas. The gas is heated until the carbon atoms separate and settle onto the seed layer by layer, gradually building up a crystal. CVD is the more common method for gem-quality stones today because it allows for more control over color and clarity.
Either process typically takes a few weeks to a couple of months, depending on the target size and quality.
What is a natural diamond?
A natural diamond forms underground under intense heat and pressure over one to three billion years, then gets carried closer to the surface through volcanic activity. It's mined, cut, and polished from there. The formation process is the same physics as HPHT, just on a geological timescale instead of a laboratory one.
Is a lab grown diamond a real diamond?
Yes. A lab grown diamond has the same chemical composition (pure carbon), the same crystal structure, and the same physical properties as a natural diamond, including its 10/10 hardness on the Mohs scale. Gemological labs like GIA and IGI grade lab grown diamonds using the same 4Cs standard (cut, color, clarity, carat) used for natural stones. The only meaningful difference is origin, not composition.
A diamond simulant, like cubic zirconia or moissanite, is a different thing entirely. Those are different materials designed to look like diamond. Lab grown diamonds are not simulants; they're chemically identical to natural diamonds.
To be clear about where we stand: TruCut Diamonds does not sell simulants. Every center stone we set is a graded diamond, lab grown or natural, and it arrives with its report.
Can you tell them apart by looking?
Not with the naked eye, and not usually with a standard jeweler's loupe either. Distinguishing lab grown from natural requires specialized equipment that checks for trace growth patterns and inclusions specific to each formation process. This is exactly why certification matters: a GIA or IGI report will state clearly whether a diamond is natural or laboratory-grown.
How to read a diamond certificate
Every certified diamond comes with a report from a grading lab, most commonly GIA (Gemological Institute of America) or IGI (International Gemological Institute). Here's what to look for:
- Origin statement: Clearly states whether the stone is natural or laboratory-grown.
- Carat weight: The precise weight, to the hundredth of a carat.
- Color grade: A letter grade from D (colorless) to Z (light yellow or brown) for standard white diamonds.
- Clarity grade: A scale from Flawless (FL) down through Included (I1-I3), describing internal and surface characteristics.
- Cut grade: How well the stone's proportions and finish allow it to reflect light, rated Excellent to Poor.
- Certificate number: A unique number you can usually verify directly on the issuing lab's website.
GIA and IGI use the same grading criteria for both natural and lab grown stones, so a report is directly comparable regardless of which type of diamond you're looking at.
The center diamond you choose from us arrives with its own report, whichever lab graded it. How certification works.
Why is there such a big price difference?
Lab grown diamonds generally cost substantially less than natural diamonds of comparable size, cut, color, and clarity. The reason is supply. Natural diamonds are finite, and the mining, sorting, and distribution chain behind them is long and expensive. Lab grown diamonds are manufactured, and as production capacity has scaled up dramatically since around 2018, costs have fallen accordingly.
One practical effect of this: someone shopping for an engagement ring on a fixed budget often finds that choosing lab grown lets them move up meaningfully in carat weight or quality grade, rather than compromising on one to afford the other.
It is also why we let you choose the stone and the setting separately instead of selling finished rings at fixed prices. A store has to sell what is already in the case. Nothing we make exists until you have chosen both halves of it, so your budget goes where you want it rather than into a combination somebody else assembled.
Why do prices vary so much between retailers?
This is one of the most confusing parts of diamond shopping. You can find two stones with identical certificates, same carat, same color, same clarity, same cut grade, from the same grading lab, priced very differently at two different retailers. That difference usually has nothing to do with the diamond itself.
A few things drive it:
- Sourcing model: Retailers who hold large physical inventory have to finance that inventory, and the cost gets built into the price. Retailers who source stones directly as orders come in carry far less of that overhead.
- Markup structure: Traditional jewelry retail markups have historically been steep, in part to cover showroom space, staffing, and slow inventory turnover.
- Overhead: Physical storefronts, especially in high-rent retail districts, carry costs that get passed along to the customer.
- Middlemen: The more hands a stone passes through between the cutter and you, the more margin gets layered on.
The practical takeaway: when you're comparing diamonds, compare certificates rather than prices alone.
If two stones have matching specs from the same lab, you're looking at genuinely comparable diamonds, and any price difference reflects how the retailer operates, not the quality of what you're getting.
You can filter certified lab grown and natural stones by shape, carat, color and clarity and compare the reports yourself.
Our own pricing follows the same logic. Every piece is made to order, so the cost of running a store never reaches your price.
Do they hold value the same way?
This is where the two differ most. Natural diamonds have an established resale and secondary market, though like most jewelry, they typically resell for less than retail price. Lab grown diamonds are newer to the market, and as production costs continue to fall, resale values have generally been declining alongside new retail prices. If long-term resale value is a real priority for you, that's worth factoring in. That said, most diamonds, lab grown or natural, are bought to be worn and kept rather than resold.
What about ethical and environmental considerations?
This is a genuinely debated area, and reasonable people land in different places. Mining natural diamonds has historically raised labor and conflict concerns, though industry certification systems like the Kimberley Process were created specifically to address conflict diamonds, and many natural diamonds today come from well-regulated, traceable sources. Lab grown diamonds avoid mining entirely, but the growth process is energy-intensive, and its environmental footprint depends heavily on the energy source powering the facility. Neither option is automatically the more responsible choice; it depends on the specific supplier and, for lab grown, the specific facility.
Common questions
Do lab grown diamonds fade or lose brilliance over time?
No. Because they're chemically identical to natural diamonds, lab grown stones are just as durable and hold their brilliance the same way over decades of wear.
Are lab grown diamonds harder to insure?
No. Most jewelry insurers treat lab grown and natural diamonds the same way for coverage purposes, insuring based on the certified appraisal value of the specific stone, whichever type it is.
Do jewelers treat lab grown diamonds differently in terms of quality control?
Reputable jewelers apply the same certification and quality standards to both. The grading criteria from GIA and IGI don't change based on origin.
Will lab grown diamond prices keep dropping?
Prices fell sharply as production scaled up, but industry analysts generally expect prices for premium lab grown stones to stabilize closer to current levels rather than continuing to fall at the same rate, as production costs approach a practical floor.
Is a lab grown diamond a good choice for an engagement ring?
For most buyers, yes. It is the same material, graded the same way, and the price difference usually buys a noticeably larger or higher quality center stone. The case for natural rests on resale value and on preferring a stone that formed underground rather than in a chamber.
How TruCut Diamonds does it differently
Most of what is written above applies to any retailer you might buy from. Here is where we are not the same.
- Handcrafted in the United States: your ring is made here, to order, rather than pulled from stock that was produced before anyone wanted it.
- You choose both halves: the center diamond and the setting are selected separately, so nothing about the ring is decided for you.
- The report comes with the stone: the center diamond you choose arrives with its GIA or IGI grading report, not a claim about it.
- You are covered either way: free returns for 30 days with a prepaid label, one free resize inside the same window, a 2-year warranty, and a price match guarantee if you find the same certified stone for less somewhere else.
So which one should you choose?
There's no universally correct answer, it depends on what you're optimizing for. If budget and size are the priority, lab grown generally offers more diamond for the money. If resale value or the traditional resonance of a natural stone matters most to you, natural may be the better fit. Both are certified, graded, and genuinely diamonds; the choice comes down to what matters most to you.
Whichever you choose, look for a diamond that comes with a GIA or IGI certificate stating its origin, cut, color, clarity, and carat weight. That certificate is what actually tells you what you're buying, regardless of which type of diamond it is.
Two ways to start
Choose a setting, then pick the diamond that goes in it. Or start with the diamond and choose the setting after. Both paths finish in the same place.