The U.S. consumer price index (CPI) for jewelry fell 1.4 percent in November from the previous month, according to the U.S. Bureau of Labor Statistics.
The reading was 3.2 percent down on the year before figure, Rapaport reported.
The decline comes against mixed figures for diamond and gold prices. Diamond prices climbed in November, with the RapNet Diamond Index (RAPI™) for 1-carat, GIA-graded diamonds rising 0.7 percent in November, its first increase in six months.
RAPI for 0.30-carat diamonds advanced 3.3 percent and RAPI for 0.50-carat diamonds grew 1.1 percent.
Gold bullion prices dropped 6.8 percent in November, the biggest monthly slide since June 2013.
Meanwhile, the November CPI for watches slipped 1.3 percent from a month ago and 1.1 percent from a year earlier, according to the U.S. labor data figures. The CPI for all urban consumers was unchanged.
