IDEX Price Report for 1 October: Downward Pressure Persists
October 01, 26
(IDEX Online) - September continued to show downward pressure on IDEX asking prices, with decreases substantially outnumbering increases in both rounds and fancies.
Rounds showed the clearer weakness, with 247 price decreases against 96 increases.
Fancies recorded 249 decreases and 142 increases.
The pattern was not uniform across all sizes. Rounds showed particularly broad weakness from 0.70-cts through 1.99-cts, where most or all of the recorded changes were downward. Larger rounds were more mixed, although decreases again dominated in the 4.00-cts to 5.99-cts categories.
Fancies also showed significant weakness in smaller and mid-sized goods, while the 2.00-cts to 3.99-cts categories were more balanced and contained a greater proportion of increases.
The smallest rounds showed little activity. The 0.18-cts to 0.22-cts category recorded only three changes, all increases, while activity in 0.23-cts to 0.69-cts remained limited. From 0.70-cts, however, the direction became much clearer, with every recorded change in both 0.70-cts to 0.79-cts and 0.80-cts to 0.89-cts being downward.
The downward trend continued through 1.00-cts to 1.99-cts. Activity became considerably broader in the larger categories. The 2.00-cts to 2.99-cts category had more decreases than increases, while 3.00-cts to 3.99-cts was evenly split. Decreases again dominated in 4.00-cts to 4.99-cts and 5.00-cts to 5.99-cts.
Fancies were also predominantly lower, particularly below 2.00 cts. The 0.18-cts to 0.29-cts categories recorded considerably more decreases than increases, while 0.30-cts to 0.39-cts saw decreases only. From 0.70-cts through 1.49-cts, decreases again dominated.
The picture became more balanced above 1.50-cts. The 2.00-cts to 2.99-cts category actually recorded more increases than decreases, as did 3.00-cts to 3.99-cts. This was followed by renewed weakness in 4.00-cts to 4.99-cts and 5.00-cts to 5.99-cts.
Rounds
0.18-0.22 ct. Increases only; G / I2 +12.5%, H / I1 +11.1%, G / I1 +10.0%
0.23-0.29 ct. Decreases dominated; N / I1 -16.7%, J / I3 -14.3%, M / I1 -14.3%, L / I1 -12.5%; M / I2 +20.0%, K / VVS1 +5.9%
0.30-0.39 ct. Decreases only; L / I2 -10.0%, N / VS2 -7.1%
0.40-0.44 ct. Decreases only; N / SI1 -6.7%
0.45-0.49 ct. Decreases dominated; K / SI2 -8.3%, J / SI2 -8.0%, K / SI1 -8.0%; J / I1 +5.6%, I / I1 +4.8%
0.50-0.69 ct. Decreases only; D / IF -6.2%
0.70-0.79 ct. Decreases only; H / SI1 -3.9%, I / VS2 -3.9%, H / VS2 -3.8%
0.80-0.89 ct. Decreases only; D / VVS1 -4.9%, I / SI1 -3.8%, H / SI1 -3.8%
0.90-0.99 ct. Mixed activity; K / I2 -8.3%, F / IF -1.8%; F / I1 +3.8%, H / SI3 +3.6%
1.00-1.24 ct. Decreases dominated; D / VS1 -6.1%, D / VS2 -5.0%, N / SI1 -5.0%; I / I2 +5.6%, J / SI3 +3.2%
1.25-1.49 ct. Decreases dominated; D / VVS1 -3.6%, M / VS2 -3.2%, F / VS1 -2.3%; D / VVS2 +2.0%, E / IF +1.8%
1.50-1.99 ct. Decreases dominated; N / SI3 -3.7%, M / SI3 -3.3%, E / SI1 -2.7%; G / VVS1 +1.0%, F / VVS1 +0.9%
2.00-2.99 ct. Decreases dominated; I / I1 -5.4%, E / SI2 -4.3%, N / I1 -3.7%; H / SI3 +6.1%, F / VVS2 +4.7%
3.00-3.99 ct. Mixed activity, with 20 increases and 20 decreases; I / I1 -6.8%, L / SI2 -4.8%; D / VVS2 +3.2%, F / IF +3.1%
4.00-4.99 ct. Decreases dominated; M / I2 -7.1%, M / SI1 -4.5%, M / IF -3.7%; N / I2 +8.7%, L / SI3 +5.7%
5.00-5.99 ct. Decreases dominated; N / VS2 -5.2%, K / VVS1 -4.7%, I / VVS2 -4.5%; F / I3 +5.0%, E / SI1 +3.2%
Fancy Cuts
0.18-0.22 ct. Decreases dominated; J / I2 -16.7%, I / I2 -14.3%, D / I3 -12.5%; J / SI3 +14.3%, I / SI3 +12.5%
0.23-0.29 ct. Decreases dominated; G / I2 -11.1%, H / I2 -11.1%, K / SI2 -10.0%; J / SI3 +11.1%, I / SI3 +10.0%
0.30-0.39 ct. Decreases only; H / I2 -10.0%, G / I1 -7.1%, H / I1 -7.1%
0.40-0.44 ct. Mixed activity, with three increases and two decreases; M / SI2 -8.3%, E / SI2 -3.7%; F / I2 +7.7%, L / SI2 +7.7%, M / SI1 +7.7%
0.45-0.49 ct. Mixed activity, with increases slightly outnumbering decreases; J / I2 -8.3%, L / I1 -8.3%; M / I2 +14.3%, G / I3 +9.1%
0.50-0.69 ct. Decreases dominated; M / I2 -10.0%, K / I1 -5.6%, M / VVS1 -4.2%; M / SI2 +6.2%
0.70-0.79 ct. Decreases dominated; M / I1 -6.2%, E / VVS2 -5.1%, M / SI2 -5.0%; M / VS1 +3.7%, L / VS1 +3.3%
0.80-0.89 ct. Decreases dominated; L / SI1 -6.5%, E / VS2 -6.3%, F / VS1 -6.1%; M / I3 +11.1%, N / I1 +8.3%
0.90-0.99 ct. Decreases dominated; D / VVS2 -5.3%, D / VVS1 -5.0%, D / IF -4.9%; E / IF +6.9%
1.00-1.24 ct. Decreases dominated; K / I2 -7.7%, N / SI1 -6.7%, N / VS2 -5.9%; F / VS2 +1.9%, G / VS1 +1.8%
1.25-1.49 ct. Decreases dominated; M / I2 -8.3%, K / I2 -7.1%, N / SI1 -5.9%; I / I2 +5.6%, F / VVS1 +5.3%
1.50-1.99 ct. Decreases slightly outnumbered increases; D / I1 -4.8%, I / SI2 -3.8%, J / VS2 -3.7%; I / VVS2 +2.7%, H / VVS1 +2.2%
2.00-2.99 ct. Increases dominated; F / VVS1 -4.0%, F / IF -3.8%, N / SI2 -3.6%; J / VS1 +4.9%, J / VVS2 +4.8%, J / VVS1 +4.7%
3.00-3.99 ct. Increases slightly outnumbered decreases; F / SI1 -4.6%, I / VS2 -3.9%, L / SI1 -3.7%; M / VVS1 +3.8%, N / SI3 +3.7%, K / SI1 +3.6%
4.00-4.99 ct. Decreases dominated; I / VS2 -4.6%, D / VS1 -3.9%, E / VVS2 -3.7%; H / VS1 +2.5%, K / SI3 +1.5%
5.00-5.99 ct. Decreases dominated; K / I3 -6.2%, N / VVS1 -4.3%, F / VVS2 -4.2%; I / VVS2 +4.6%, H / VS1 +4.5%
Basis of comparison: IDEX Diamond Price Reports dated 01 September 2026 and 01 October 2026. Percentages shown are month-on-month changes in the published asking-price tables.