Lab-grown diamonds have strengthened their lead in American engagement rings. According to The Knot's 2026 Real Weddings Study, 61% of engagement rings now feature a lab-grown centre stone, up from 52% in the previous study, when lab-grown first passed the halfway mark.
Other findings
- The average centre stone has grown to around 1.9 carats.
- The average engagement ring cost has come down, reported at around $4,600.
- About 40% of couples said it was important that their stone be lab-grown, showing that many buyers choose lab-grown for its own sake, not only for price.
Why the shift continues
- Value: couples get more diamond for their budget.
- Values: clear origin and modern production appeal to many couples.
- Acceptance: with the biggest retailers selling lab-grown, it's simply a mainstream choice.
What it means for buyers
You're in the clear majority if you choose lab-grown. Focus on the essentials: cut quality, a verified IGI report, and a well-made setting.
What it means for jewelers
Lab-grown is the main event in bridal. Customers expect certified stones, larger sizes and bespoke options.
Good news for India
The US is the largest market for India's laboratory-grown diamonds, and Surat's cutters polish a large share of the stones in these rings.
Planning a proposal? See ring shapes, our budget guide, or contact us.
Sources: IDEX Online, The Knot Worldwide, JCK
