Cut and polished diamond
1322010001 · Item · weight 0.5038
Latest index
77.40
Sep 2026 · Provisional
Change over 12 months
−5.72%
Since Sep 2025
Data available
Jan 2005 – Sep 2026
Combined index, 2022-23 = 100
Combined index since Jan 2005
The 2022-23 series joined to its 2011-12 and 2004-05 counterparts and put on the 2022-23 scale, so the whole history reads as one line. It is the index the calculator uses.Published monthly index (2022-23 series)
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 78.00 | 79.60 | 78.40 | 74.40 | 76.40 | 79.10 | 75.40 | 72.70P | 77.40P | — | — | — |
| 2025 | 84.80 | 91.20 | 87.90 | 88.40 | 87.60 | 86.00 | 85.00 | 81.30 | 82.10 | 79.00 | 83.10 | 79.30 |
| 2024 | 89.50 | 90.50 | 95.20 | 96.20 | 96.00 | 91.90 | 85.40 | 83.00 | 84.60 | 82.50 | 86.70 | 83.00 |
| 2023 | — | — | — | 90.50 | 95.50 | 89.10 | 92.20 | 86.30 | 88.70 | 91.70 | 94.60 | 89.90 |
P Provisional — the two most recently published months may still be revised. Values before April 2023 come from the older series; see the chart, or calculate with “Show index values” on.