Premium categories experienced controlled adjustments in December. D FL edged down to $16,192 from $16,222, while D VVS1 decreased to $10,645 from $10,840. D VVS2 followed the same trend, moving to $8,110 from $8,275. The strongest gain in this tier came from D IF, which increased to $14,023 from $13,837.
E-grade diamonds showed a similar mix of slight shifts. E IF increased to $11,051 from $10,997, while E FL softened to $12,057 from $12,107. F IF continued to settle after earlier highs, moving from $10,452 to $10,226.
