Russian diamond mining giant ALROSA reported rough diamond sales of $245.6 million for November.
Meanwhile, the firm's polished diamond sales for last month were $9.6 million.
The total diamond sales in November 2016 of $255.2 million, were 63% higher than November last year.
"The market activity at year-end was affected by India's currency reform in November," said Yury Okoemov, ALROSA Vice President.
"One of its effects was a temporary decline in the activity of India's small and middle-size diamond cutting companies, which also affected the low-end small-size rough diamond segment. Activity in other market segments remains high."