More couples are choosing lab-grown diamonds vs. natural for engagement

By Finance News On Mar 10, 2025

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More couples are saying “yes” to lab-grown diamonds.

In 2024, 52% of couples surveyed said their engagement ring featured a lab-grown diamond, according to the 2025 Real Weddings Study by The Knot. The popularity of lab-grown diamonds increased by 6% from last year and by 40% since 2019, the bridal site found.

In addition to data from prior reports, the Knot 2025 Real Weddings Study includes insights from nearly 17,000 couples in the U.S. who got married in 2024 and data from couples getting married in 2025.

Many couples end up buying a lab-grown diamond ring because of the lower price tag, according to experts. On average, a proposer looking to buy a lab-grown engagement ring could expect to spend about $4,900 compared with $7,600 for a mined diamond ring, the Knot found.

In general, lab-grown diamonds can sell for around one-tenth the price of a comparable natural diamond, according to Paul Zimnisky, a global diamond industry analyst and founder of Paul Zimnisky Diamond Analytics.

In the first quarter of 2025, an unbranded, round, 1-carat lab-grown diamond costs about $845, according to Zimnisky’s proprietary data and analysis. A similar natural diamond would cost about $3,895.

Lab-grown diamonds possess the same chemical properties and hardness as naturally mined diamonds, and thus are subject to the same “four C’s” — cut, color, clarity and carat — grading system as natural gems.

The big question — can you tell if a diamond was human-made or mined?

Both stones are optically the same, meaning they will look the same to the naked eye, experts say. However, under the proper testing conditions, scientists and jewelers with the expertise can tell them apart, according to Ulrika F.S. D’Haenens-Johansson, a research scientist and senior manager of diamond research at the Gemological Institute of America.

If you’re in the market for an engagement ring this year, here are some key factors you should consider about lab-grown diamonds versus a natural diamond, according to experts.

Pros and cons to a lab-grown diamond

A major advantage to lab-grown diamonds over natural diamonds is the lower cost. Prices for lab-grown diamonds have been dropping as manufacturers increase the supply.

“The price has become enticing for a lot of people,” said Amanda Gizzi, director of public relations and events at the Jewelers of America, a trade organization.

However, there are other factors to consider when it comes to lab-grown diamonds:

Ethics: For some shoppers, lab-grown stones helped provide an option for those concerned about “blood diamonds,” or diamonds mined in war zones and used to fund conflict and human rights abuses. However, experts noted that the diamond industry has come a long way from how diamonds are sourced. The Kimberley Process is an international…