Average Polished Index 2022 - 2025 : This graph highlights the continued decline in polished diamond prices over the past four years. Compiled by I. Hennig & Co Ltd, from a number of proprietary & public sources; includes data to August 2025

In June 2025, the international diamond industry reached an agreement to create a collective marketing fund to support natural diamonds. Funded by a range of key figures in the diamond industry, it is known as the Luanda Accord.