A sixth quiet session: the board holds since September's RAPI, with JIS Fall in Miami now two days out as the first dated test
Polished
The board still sits where the September RAPI left it when it printed on October 6: the small end led, with the 0.50ct index up 2.5% for the month against a slim 0.3% at one carat, and a sixth session has now passed without extending or reversing that read. The macro side again offers nothing to trade on, with the shekel and the rupee each inside the 1.5% weekly line that matters for quoting and gold down 3.82% since September 14, within the 5% band that reaches jewelry cost rather than stones. For a trader quoting this morning, the sheet reads where it did last week.
On the radar
The catalysts are dated and still ahead. JIS Fall opens in Miami on the 16th, two days out and the first live read on US holiday demand, before the Dubai cluster fills the 26th to 29th with the Dubai Diamond Conference and JGTD. The harder figures come later: De Beers' October sight on the 26th to 30th, the quarter's clearest signal on rough pricing, and the October RAPI in early November, which tests whether September's small-stone lead held or faded. Two watch-items still carry over unconfirmed this morning: Botswana's response on the De Beers stake, flagged for mid-October, and a reported US-India tariff step unconfirmed for around the 18th.
Anglo American's Q3 2026 production report lands October 20, carrying fresh De Beers rough output and price data
Anglo American's third-quarter 2026 production report is scheduled for October 20, per its investor calendar. It carries De Beers' Q3 rough production volume and average realized price, the first hard producer data since the half-year results, and it arrives days before the month's closing sight.
What to do: Read the De Beers Q3 output and realized-price figures on October 20, before you commit at the closing sight. They show whether the producer is still clearing volume over defending price.
RAPI September: 0.30ct +3.2%, 0.50ct +2.5%, 1ct +0.3% as the small-stone recovery runs into a second month
Rapaport's September index, published October 6, rose 3.2% for 0.30-carat goods, 2.5% for 0.50-carat and 0.3% for one-carat, the one-carat index's second consecutive monthly gain. Year to date the 0.30-carat index is up 15.1% and the 0.50-carat index is up 5.8%. The underlying Rapaport price list was raised on September 11 for parts of the 0.30 to 0.69-carat range in D-G, VVS1-SI1. The recovery that started in the smallest sizes is now carrying the pointer goods a working trader actually stocks.
What to do: Re-price 0.30 to 0.50-carat polished inventory off the September 11 list rather than older sheets, and hold firm when quoting those sizes. Buyers who are waiting for cheaper small stones should note that this is the second month of gains, not a one-off bounce.
Rio Tinto transfers the Argyle Pink Diamonds brand and its last inventory to British jeweler Boodles
On October 1, 2026 Rio Tinto completed the handover of the Argyle Pink Diamonds brand, including its trademarks and digital assets, to the British jeweler Boodles, which also bought the last remaining stock of Argyle pink diamonds. The Argyle mine in Western Australia supplied more than 90 percent of the world's pink diamonds before it closed in November 2020.
What to do: If you hold or trade Argyle pink diamonds, note that provenance and branding now sit with Boodles and that the final primary inventory has left the open market, so there will be no new Argyle supply from Rio Tinto. Factor that confirmed scarcity into how you value and price fancy pink stones already in stock.
Petra Diamonds launches a strategic review that may include selling its assets
On October 1 Petra Diamonds said it had begun a strategic review of options to meet its near-term liquidity needs, including a potential sale of its assets. After disposing of Finsch in August 2026 (as reported by Rapaport), Williamson in 2025 and Koffiefontein in 2024, Cullinan in South Africa is now its only remaining producing mine.
What to do: Most of the trade needs only to watch this. If you buy or hold Cullinan goods, follow the review for any hit to supply or pricing and keep alternative sources in reach.
US authorizes tariffs of up to 100% on imports from Russian-oil buyers, putting Indian gem and jewelry shipments at risk from October 18
IDEX reports that the US administration signed legislation on September 18 granting authority to impose additional tariffs of up to 100% on imports from countries it links to Russian energy purchases, a group that includes India. The duty is not automatic, but trade press says it could take effect as soon as October 18. Indian exporters, whose gem and jewelry sales to the US run around $9 billion a year, have added factory overtime in Surat and Mumbai to clear confirmed holiday orders before the window closes.
What to do: Clear confirmed US-bound holiday orders before the October 16 to 18 window, coordinating with your freight forwarder this week. On any new US contract, add a clause that states who pays if an additional duty lands after shipment, so a sudden rate change does not fall on you by default.
Rapaport RAPI 1ctRapaport index tracking the average asking price of 1-carat round polished diamonds on RapNet — the industry's core polished-price benchmark.Sep 2026
+0.3%
▲—
Rapaport RAPI 0.50ctRapaport index for half-carat round polished diamonds — a gauge of demand in the smaller, more commercial size range.Sep 2026
+2.5%
▲—
USD / INRUS dollar to Indian rupee rate. India polishes ~90% of the world's diamonds, so the rupee moves manufacturers' costs and margins.1w
95.16
▼-1.18%
GoldSpot gold price per troy ounce — the main raw-material cost for jewelry manufacturing and a barometer of safe-haven sentiment.1m
$4,125.50/oz
▼-5.20%
De Beers $/ctAverage price per carat of rough diamonds sold by De Beers in its sales cycles — a leading signal for rough supply pricing.H1 26 YoY
$105/ct
▼-32.0%
India Polished ExportsMonthly value of polished diamond exports from India (GJEPC data) — a key gauge of global downstream demand.Aug 2026 YoY