Natural diamonds fight back as lab-grown stones dominate engagement rings

A buyer walking into a showroom with about $4,000 faces a sharper divide than ever. Paul Zimnisky’s Q1 2025 price comparison put an unbranded 1-carat lab-grown diamond at an average of $845, versus about $3,895 for a comparable natural stone, which means the same budget can either go toward a smaller natural center stone or stretch much farther in lab-grown. That gap is now the center of the engagement-ring pitch.

The numbers explain why. The Knot Worldwide’s 2026 Real Weddings Study found lab-grown center stones accounted for 61% of engagement-ring purchases for couples married in 2025, a 239% jump since 2020. It was also the first year, in 2024, that lab-grown center stones passed the 50% mark. BriteCo’s 2025 data analysis showed the category had already climbed to more than 45% of U.S. engagement-ring purchases by 2024, a sign that what once looked like a niche buy has become the default choice for many couples.

Natural-diamond sellers are answering with a different argument: not cheaper, but rarer. The Natural Diamond Council said demand for natural diamond jewelry stayed resilient in 2025 despite tariffs, inflation and higher gold prices. Its report, based on more than four million transactions from 2,500 U.S. specialty jewelers, found natural-diamond jewelry sales rose 2.1% and average prices climbed 10%. That gives jewelers a basis to defend the premium, especially when they talk about provenance, individuality, responsible sourcing and the idea that a natural diamond carries a story no laboratory can duplicate.

De Beers has pushed that message into the shop window. On June 6, 2025, it launched Ombré Desert Diamonds and ORIGIN - De Beers Group, two downstream initiatives meant to drive desire for natural stones and distinguish De Beers-sourced polished diamonds. The company has also said the widening retail price gap is speeding consumer awareness that natural and lab-grown diamonds are fundamentally different products, and that lab-grown stones fit best in fashion jewelry rather than bridal.

Design trends are helping the natural camp find its footing. The Natural Diamond Council said 2025 brought demand for larger stones, long fancy shapes and more distinctive engagement-ring styles. In other words, the fight is no longer just about carat weight. It is about whether a ring is bought for size-for-money or for the premium story jewelers are now working harder to sell.