Last week we published our monthly report on the Mercury Diamond Global Tracker™ (MDGT™) for December, showing that prices of most round diamond size ranges between 0.30 carats to 2 carats rose during the last few months of the year. At the same time, our index, which covers a very wide range of goods has declined. It seems puzzling, but it really hides a sad truth about demand for polished diamonds around the world, mainly in the US and China, the two largest consumer markets.