Rapaport Research Report - September 2025

The Rapaport Research Report is essential reading for those seeking to understand diamond price trends and the current state of the industry throughout the diamond pipeline.

The report includes extensive, proprietary data from RapNet, the world’s largest diamond trading platform, giving a snap shot of real-world pricing information, inventory levels and transactional data to help you keep track of the market. This includes average prices, discounts and inventory by country alongside search volume, average time to sale and transaction volume.

In addition to reviewing the global rough, polished and retail markets, each month the Rapaport Research Report focuses in on a key issue affecting the diamond industry, providing definitive analysis and insight, while assessing the potential impact on your business and the industry as a whole.

This edition analyzes the relationship between prices of US- and India-based diamonds before and after the tariffs. It explains how and why the gap between prices in the two countries fluctuates in line with market conditions and explores the increased volatility that has been visible since US President Donald Trump introduced duties on imports. Using exclusive RapNet data, the report investigates trends in a range of 0.50-, 1- and 2-carat categories and presents graphs to illustrate the geographical price differences over time.

If you are interested in a subscription to the Rapaport Research Report, visit: http://info.diamonds.net/rapaport-research-report-subscribe

Please note, all issues prior to January 2018 are called the Rapaport Monthly Report and only contain a market overview and general review of the RAPI.