While the diamond industry experienced a strong start to 2017, overall data for the first six months of the year suggests its momentum has begun to stall. According to diamond industry analyst Paul Zimnisky, the United States – the industry’s largest market – has seen somewhat underwhelming demand for retail diamond jewelry, despite the market’s overall strong economic performance. China, the industry’s second-largest market, however, has seen demand for diamonds improve against the backdrop of a thriving market.