Lab-grown diamonds have taken over the engagement ring market. In 2026, 61 percent of engagement rings feature lab-grown center stones — up from just 12 percent a decade ago.
But if you're new to diamond shopping, you probably have questions. Are they real? Are they as durable? Why are they so much cheaper? This guide covers everything you need to know.
What Is a Lab-Grown Diamond?
A lab-grown diamond is a real diamond created in a laboratory instead of mined from the earth. It has the exact same chemical composition (pure carbon), crystal structure, hardness (10 on Mohs), and optical properties as a natural diamond.
The only difference is origin. One formed underground over billions of years. The other was grown in a lab over weeks. The material itself is identical.
Are Lab-Grown Diamonds Real Diamonds?
Yes. The Federal Trade Commission has confirmed that lab-grown diamonds are diamonds — removing the word "natural" from the official definition in 2018. GIA and IGI grade them using the exact same 4Cs scale as natural diamonds.
A lab-grown diamond passes a standard diamond tester. It scores 10/10 on hardness. It has the same refractive index (2.42) and the same fire and brilliance. No one can tell the difference by looking at it — not your friends, not a jeweler with a loupe.
How Are Lab-Grown Diamonds Made?
There are two methods:
HPHT (High Pressure High Temperature): Mimics the natural conditions deep underground — extreme heat and pressure applied to a carbon seed. This was the first method developed and is still widely used.
CVD (Chemical Vapor Deposition): Carbon gas is broken down in a vacuum chamber, depositing carbon atoms layer by layer onto a diamond seed. This method offers more precision and is the most common method used today.
Both produce identical results. The rough diamond is then cut, polished, and graded — exactly like a natural diamond.
How Much Cheaper Are They?
Lab-grown diamonds cost 70 to 85 percent less than natural diamonds of comparable size and quality.
Here's a real-world comparison for 2026:
1 carat, G color, VS2, Excellent cut: Natural $4,500-$7,500 | Lab $600-$1,200
2 carat, G color, VS2, Excellent cut: Natural $15,000-$28,000 | Lab $1,200-$2,500
3 carat, G color, VS2, Excellent cut: Natural $30,000-$55,000 | Lab $2,000-$4,000
That $3,000 budget everyone talks about? It buys a 2-carat lab-grown diamond or a 0.5-carat natural diamond.
Do They Look Different?
No. A well-cut lab-grown diamond and a well-cut natural diamond are visually identical. Both sparkle the same way. Both have the same fire and brilliance. Both can have inclusions or be eye-clean.
The only way to tell them apart is with specialized spectroscopy equipment at a gemological laboratory. To anyone looking at the ring on your finger, there is zero visible difference.
Do They Last as Long?
Yes. Lab-grown diamonds are just as hard as natural diamonds — 10 on the Mohs scale, the highest possible. They will not scratch, fade, yellow, or degrade over time. A lab-grown diamond lasts forever, just like a natural one.
Are They Ethical and Sustainable?
Lab-grown diamonds are inherently conflict-free. There is no mining, no habitat disruption, and no community displacement. The supply chain is fully traceable — you know exactly where and how your diamond was grown.
Environmentally, lab-grown diamonds produce significantly less CO2 per carat than mining operations — roughly 15 to 50 kg versus 5,000 to 15,000 kg for mined diamonds.
What About Resale Value?
Lab-grown diamonds resell for 10 to 20 percent of retail. Natural diamonds resell for 25 to 50 percent. That's a real difference.
But here's the context: a $10,000 natural diamond loses $5,000 to $7,500 at resale. A $2,500 lab-grown equivalent loses $2,000 to $2,250. The lab-grown buyer loses less money in absolute terms. And most engagement rings are never resold — they're worn for a lifetime.
Frequently Asked Questions
Can a jeweler tell if a diamond is lab-grown?
Not with standard tools. Only specialized equipment at gemological laboratories can distinguish lab-grown from natural. To the naked eye and under a loupe, they're identical.
Do lab-grown diamonds test as diamonds?
Yes. They pass standard diamond testers because they have the same thermal conductivity and refractive index as natural diamonds.
Are lab-grown diamonds a good investment?
Neither lab-grown nor natural diamonds are good financial investments. Both lose value after purchase. Buy the ring you love to wear.
Can you insure lab-grown diamonds?
Yes. Most jewelers and insurance companies insure lab-grown diamonds the same as natural ones. Just make sure your appraisal clearly states the stone is lab-grown.
Shop Lab-Grown Diamonds at Lara Jewels
Every lab-grown diamond at Lara Jewels is GIA or IGI certified and hand-selected for quality. Browse our lab-grown diamond collection or book a consultation to see the difference for yourself.
