The average cost of an engagement ring rose 9% in 2025 to $7,364, according to the latest Natural Diamond Council (NDC) trend report.
The top-selling diamond shape for an engagement ring was round, which represented 62% of units sold, followed by oval at 14%, the NDC reported last week. The average stone size was 1.16 carats and the most common clarity was SI1. Overall, diamond engagement rings…
