Natural diamond prices fall 11.5% over 12 months

Natural diamond prices have decreased by 11.5% between March 2025 and March 2026, according to a new research by 77 Diamonds. 

Analysis of the IDEX Diamond Index revealed that the sector has not recorded positive monthly growth since June 2025.

The figures were released to coincide with the inaugural World Diamond Day on 8 April 2026. 

The event was established by the Natural Diamond Council to highlight the cultural significance of mined stones.

According to the report, the decline was attributed to the increasing availability of lab-grown diamonds, which offer a similar appearance at a lower cost. 

Global economic conditions and rising precious metal prices have also contributed to softer demand for luxury jewellery.

The report noted that price movements are not uniform across the sector. Larger stones with high-quality cut and clarity have remained more resilient than mass-market diamonds.

Tobias Kormind, co-founder of 77 Diamonds, said: “Even though we notice a growing interest around lab-grown diamonds, we don’t see it as a detriment to the value of high-quality natural stones.

“Of course, economic conditions are hard at the moment, and for many people the aesthetic quality of lab-grown diamonds make them a compelling option for more everyday pieces. The great news for consumers is that there is an abundance of choice available on the market. If you follow your heart, there is no right or wrong decision.”