Diamond prices continued their decline last month as markets were relatively quiet due to weak post-JCK Las Vegas demand in the United States, the Rapaport Group said in its monthly price report.
In June, the RapNet Diamond Index (RAPI) for 1-carat lab-graded diamonds fell 1 percent, while the RAPI for both 0.30-carat diamonds and 0.50-carat diamonds decreased by 3 percent. RAPI for 3-carat stones declined by 2 percent.
Meanwhile, RAPI for 1-carat diamonds was down 2 percent during the second quarter of 2015, and as of July 1, was down 15 percent year-over-year.
According to the Rapaport monthly report for June, “Summer Heat Brings Price Pressure,” manufacturers are under pressure, and their profit margins are being squeezed between the stable prices of rough and the declining prices of polished diamonds.
“Rough prices remained relatively stable throughout the second quarter of 2015 after falling an average of 5 to 7 percent during the first three months.”