Lab-Grown Diamonds: The Pros and Cons Explained

Lab-grown diamonds have moved from a niche curiosity to a mainstream choice, and for good reason. But like any purchase, they come with trade-offs. Here is an honest, balanced look at the real advantages and the genuine drawbacks, so you can decide whether a lab-grown diamond is right for you.

In short: Lab-grown diamonds are real diamonds that cost 60% to 85% less than mined stones, are conflict-free, and let you buy bigger or better for your budget. The main downsides are weaker resale value, steadily falling prices, and, for some buyers, the loss of the rarity and romance attached to a natural diamond.

The pros

They are genuine diamonds

A lab-grown diamond has the same chemical, physical, and optical properties as a mined one. It scores a perfect 10 on the Mohs hardness scale and sparkles identically. It is not a simulant like cubic zirconia or moissanite. You can read how the 4Cs apply equally to both in our diamond education guide.

Significantly lower cost

This is the headline benefit. For the same carat, color, clarity, and cut, a lab-grown diamond typically costs a fraction of a natural one, which means you can choose a larger stone or a higher grade for the same money. See real examples on our price comparison page.

Conflict-free and traceable

Because each stone is created in a controlled facility, its origin is fully known. There is no risk of it being a conflict diamond, which gives many buyers real peace of mind.

More choice for your budget

The savings open up designs that might otherwise be out of reach, from a larger center stone in an engagement ring to a fully-set eternity ring or a pair of statement diamond earrings.

The cons

Weaker resale value

Lab-grown diamonds do not hold their value the way natural diamonds can. If you expect to resell or trade up, a natural stone generally retains more of its worth. Lab-grown is best viewed as beauty and size for your money now, not as an investment.

Prices are still falling

As production scales, lab-grown prices have trended down year after year. That is wonderful when you are buying, but it means the stone you buy today may cost less next year, which further limits resale potential.

Less rarity and sentiment

For some people, part of a diamond’s meaning is that it formed over billions of years deep in the earth. A lab-grown stone cannot offer that story, and a minority of buyers value the natural origin enough to pay the premium.

Environmental claims are nuanced

Lab-grown diamonds avoid the land disruption of mining, but growing them is energy-intensive. The true footprint depends on whether the facility uses renewable energy. Both options have environmental costs, so it is worth looking past simple marketing claims.

So, are they worth it?

For most shoppers who want the maximum size and sparkle for their budget and a conflict-free origin, lab-grown diamonds are an excellent choice. If long-term resale value or the romance of a natural origin matters most to you, a mined diamond may suit you better. Either way, always buy a certified stone with a GIA or IGI report. Explore the full lab-grown diamond collection at Rêve Diamonds to see the value for yourself.

Frequently asked questions

Are lab-grown diamonds real diamonds?

Yes. They are identical to mined diamonds in every measurable way and are graded by the same laboratories. They are not simulants like cubic zirconia.

Do lab-grown diamonds pass a diamond tester?

Yes. Because they are true carbon diamonds, they test as diamond. Distinguishing them from natural stones requires specialized laboratory equipment.

Is a lab-grown diamond a good choice for an engagement ring?

For many couples, yes. It offers the same look and durability as a natural diamond for far less, freeing up budget for the setting or a larger stone. Browse engagement rings to compare.