The IDEX Online Polished Price Report – December 2018

(IDEX Online News) – Price changes in round and fancy shape diamonds in December were fairly evenly divided between decliners and risers, with relatively few changes in the smallest and largest sizes. In round goods, stones of 0.23-0.29 carats in K, VVS1-VS2, fell 4%; in 0.30-0.39 carat diamonds D-F, VS2, by 2-3%; in 0.45-0.49 carat diamonds D, VS2-SI2, of 1-3%. Meanwhile, there were rises in diamonds of 0.70-0.79 carats in E-F, VS2-SI2, of 2-3%; in 0.80-0.89 carat stones, E-G, I3 of 4%; in 0.90-0.99 carat stones, M-N, IF-VVS1, of 3-4%; and in 1.00-1.24 carats, F-H, VS1-SI1.

Fancy diamonds saw increases in the 0.40-0.49 carat category, D-E, VVS1-VS2 of 2-3%; in 1.00-1.24 carat diamonds, D-G, SI2, of 3%; and in a range of categories in 1.50-1.99 carat stones, D-J, VS1-SI1 OF 1-3%. Meanwhile, there were decreases in 0.50-0.69 carat stones of 2-4% in VVS2, G-I colors; in 1.00-1.24 carat stones, I-K, VS1, of 2-3%; in 1.50-1.99 carat stones, D-G, VVS1-VVS2 of 2-3%; and in 2.00-2.99 carat stones, E-H, VVS1 of 1-3%.

The following are some of the changes in this week's IDEX Online Diamond Price Report.

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Rounds

• 0.18-0.22 cts F-G / SI2 -4%, H / SI1-SI2 +5%
• 0.23-0.29 cts K / VVS1-VS2 -4%
• 0.30-0.39 cts D-F / VS2 -2%
• 0.40-0.44 cts E / VVS2-SI1 3%, D / SI2 +2%
• 0.45-0.49 cts D / VS2-SI2 1-3%, 1 / SI2 +3%
• 0.50-0.69 cts F-G / VS2 -2-3%, K / VS1 +2%
• 0.70-0.79 cts D-F / VVS2 -1-3%, E / SI1-SI2 +2-3%
• 0.80-0.89 cts D / VS1 -3%, G-H / SI2 +2-3%
• 0.90-0.99 cts H / IF-VVS1 -2%, M-N / IF-VVS1 +3-4%
• 1.00-1.24 cts K / VS1 -2%, F-G / SI1 +2%
• 1.25-1.49 cts E / IF-VVS1 -3%, N / I1 +5%
• 1.50-1.99 cts G / VVS2 -2%, G / VS1 +2%
• 2.00-2.99 cts H / SI2 -3%, J / SI1-SI2 +3%
• 3 cts D-E / VS1 -2-3%, H-I / VS1 +3%
• 4 cts G / VS1-VS2 -3%
• 5 cts N / SI1-3%

Fancy Cuts

• 0.18-0.22 cts D / SI1 +5%
• 0.23-0.29 cts E / VVS2 +2%
• 0.30-0.39 cts H / SI1 -3%, G / SI2 +3%
• 0.40-0.44 cts D / IF -2%, D-E / VVS1-VS1 +2-3%
• 0.45-0.49 cts No changes
• 0.50-0.69 cts G-I / VVS2 -1%, I / VS1 +1%
• 0.70-0.79 cts J / SI1-SI2 -2%, E-F / VVS1 +2%
• 0.80-0.89 cts H / VVS2-VS1 -2%, F-G / VS2-SI2 +1-3%
• 0.90-0.99 cts I / VVS1-VVS2 -2-3%, G / VS2-SI1 +3%
• 1.00-1.24 cts I-K / VS1 -2-3%, D-G / SI2 +3%
• 1.25-1.49 cts D-E / SI2 -3%
• 1.50-1.99 cts D-F / VVS2 -2-3%, H-J / SI1 +2-3%
• 2 cts E-H / VVS1 -1-3%, D-E / VS2 +1-2%
• 3 cts I-K / VS2 -2-3%, I / VVS2-VS1 +3%
• 4 cts No changes
• 5 cts F / VS2 -2%