The jewelry market is now living in two economies at the same time, and on April 29, 2026 — the day De Beers published its Q1 2026 Production Report — the gap between them widened to a number that is hard to ignore. The world’s largest diamond miner sold its rough at an average realized price of $101 per carat, down 19% year-over-year, with a rough price index 17% lower than Q1 2025, even as it pushed production volume up 17% to 7.1 million carats. Five days earlier, on April 23, Sotheby’s Hong Kong closed a High Jewellery live sale at HKD 257 million (~$33 million) with 89% of lots sold, exceeding pre-sale estimates and signaling, in the auctioneer’s own framing, “renewed strength in Asian demand for high-value jewellery.” The same week, in the same asset class, on the same continent: rough diamonds in price compression, polished trophies in a bidding war.
That is the K-shape settling into jewelry, exactly as it has settled into the watch market, the art market, and the classic car market across the three previous Tier 4 desk reports we have published this month. The pattern is now consistent enough across luxury asset classes that it should be treated as the operating reality rather than a curiosity. What follows is a market read on where the data sits as Q1 closes, what the May 2026 auction calendar will test, and three specific decisions an asset owner should be working through before the Geneva sales hit the block.
The bottom of the market: De Beers Q1 2026 in the operator’s own numbers
The Q1 2026 Production Report De Beers released on April 29, 2026 is the cleanest read available on the rough diamond market because it comes from the producer, not from a trade-press summary. The headline figures: rough diamond production rose 17% year-over-year to 7.1 million carats, driven by planned ore release at Gahcho Kué in Canada and higher volumes from Venetia underground in South Africa, where output jumped 53% to 0.7 million carats. Botswana production rose 5% to 4.8 million carats on a higher recovered grade at Orapa, with Jwaneng broadly consistent with the prior period. Namibia fell 12% to 0.6 million carats due to scheduled vessel maintenance and the decommissioning of two vessels in 2025. Canada produced 1.0 million carats.
What matters more than the carats is the price line. Consolidated rough diamond sales revenue was $648 million across two Sights in Q1 2026, against $520 million across two Sights in Q1 2025. The volume sold was 7.7 million carats (6.4 million on a consolidated basis), versus 4.7 million carats (4.2 million consolidated) a year earlier. So De Beers moved roughly 65% more volume to generate 25% more revenue. The math: a consolidated average realized price of $101 per carat, down 19% from a year ago, with a 17% decrease in the average rough price index — and the company itself attributes the rest of the gap to “a sales mix with a higher proportion of lower value goods.” Trading conditions, in the report’s words, “continued to be challenged due to ongoing industry, geopolitical and tariff headwinds.”
De Beers reaffirmed full-year 2026 production guidance of 21–26 million carats and unit cost guidance of approximately $80 per carat. Anglo American, in the same report, restated that it is “committed” to divesting De Beers and continues to “progress a formal sale process,” with an update expected “through the course of 2026.” That last sentence is the one to file, because the structural buyer of last resort for the rough market is itself for sale.
The polished read: Rapaport’s index and what’s happening below the auction line
Rapaport’s monthly press releases give the cleanest picture of polished diamond pricing because the RapNet Diamond Index (RAPI™) tracks real asking prices on the world’s largest diamond trading network. According to the Rapaport press release dated February 4, 2026 covering January data, the RAPI for 0.30-carat goods fell 1.3% in January, the 0.50-carat RAPI fell 1.2%, the 1-carat RAPI fell 1.3%, and 3-carat diamonds slid 1.6% — a reversal after recent stability. Rapaport headlined the release “Decline in Diamond Prices Eases,” because the rate of decline did moderate, but the direction was still down across every standard category.
March did not improve. The RAPI for 1-carat diamonds fell 1.7% in March 2026, with 0.30- and 0.50-carat goods down 1.1% and 3.5%, respectively. The structural exception, which is also the through-line in this entire report, is at the top of the supply ladder: rough of 5 carats and larger remained “sought-after amid tight supply,” with price increases reported at De Beers’ March sight even as the broader index fell. Same pattern in two different shapes: the top is bid, the middle is offered, the bottom is being repriced.
Two structural data points from the Rapaport coverage of Q1 belong in the macro read. First, De Beers removed 20 to 25 sightholders from its 69-strong client list for the contract period that begins July 1, 2026, citing “greater efficiency” — language that, in any other industry, would be called a supply consolidation. Fewer authorized buyers, less aggregate demand, less price support. Second, Signet Jewelers — the parent of Kay, Zales, and Jared and the largest specialty jewelry retailer in the United States — reported full-year sales of $6.81 billion for the fiscal year ended January 31, 2026, up 1.6% from the prior year. As part of its strategy reset, Signet is closing the James Allen e-commerce site and absorbing the brand into Blue Nile, which the company is now positioning to focus “mostly on natural diamonds.” That last decision is not a forecast; it is a publicly stated business decision by the U.S. retail leader, and it tells you where they think the natural-diamond margin still lives at the consumer level.
The top of the market: Sotheby’s Hong Kong, the Mellon Blue benchmark, and the spring calendar
Now turn the page to where the K-shape has its other arm. Sotheby’s Hong Kong’s High Jewellery sale in April 2026 closed at HKD 257 million (approximately $33 million) with 89% of lots sold, per the Diamond World report dated April 25, 2026. The auction exceeded pre-sale estimates. The headline rate matters: an 89% sell-through in jewelry, in Hong Kong, in April 2026, with bidders consistently competing past conservative valuations, is not a market sending a defensive signal. It is a market saying that the upper-tier collector base has cash and is deploying it into rare, signed, and well-provenanced pieces — exactly the categories that have been holding their pricing through the broader downturn.
The most useful price benchmark from late 2025 sits underneath that result. At Christie’s Geneva Magnificent Jewels on November 11, 2025, the Mellon Blue — a 9.51-carat modified pear brilliant-cut Fancy Vivid Blue diamond ring — sold for CHF 17.9 million (approximately $21.5 million), the top lot of an auction that closed above CHF 60 million ($70 million+). The same sale featured “A Bouquet of Gems,” a JAR (Joel Arthur Rosenthal) collection of 21 pieces; the JAR Diamond “Apricot Blossom” expandable bangle alone realized CHF 2,374,250. The signal there is the same as the signal from Sotheby’s Hong Kong: blue diamonds, JAR signed pieces, and provenance-tied trophies are on a different curve than the standard-goods polished market that Rapaport is tracking.
The May 2026 verdict: four sales, one continent, two cities, three weeks
The next three weeks will deliver the cleanest test of whether the K-shape thesis holds at trophy level. Four major jewelry sales are scheduled, and the price benchmarks will be set in a tight window.
Phillips Geneva Jewels Auction VI — Monday, May 11, 2026. Phillips is opening with what its press materials describe as the introduction of a “Collections & Provenance” offering. The lead lot is a ring centering a 19.93-carat Burmese sapphire, estimated at CHF 260,000 to CHF 480,000 ($320,000 to $600,000). Other publicly announced highlights include a Van Cleef & Arpels interchangeable zip necklace and bracelet with coral, chrysoprase and diamond at CHF 240,000 to CHF 400,000 ($300,000 to $500,000), a ruby and diamond necklace at CHF 230,000 to CHF 280,000 ($280,000 to $350,000), and a ring set with a 14.69-carat Colombian emerald. The Phillips catalogue draws provenance from the Vanderbilt family, the kings of Bavaria, and other European Noble Houses, and includes design-house pieces from Graff, Boucheron, and Cartier. Phillips’s Geneva Jewels Auction V realized $17 million in May 2025 with the Vanderbilt sapphire as its anchor; VI will be the first read on whether the provenance-led model continues to compound.
Christie’s Magnificent Jewels Geneva — Wednesday, May 13, 2026, at the Four Seasons Hotel des Bergues. The lead lot is the most newsworthy single jewel of the season: The Ocean Dream, a 5.50-carat Fancy Vivid Blue-Green diamond returning to the same saleroom 12 years after Christie’s last sold it in May 2014 for CHF 7.8 million (approximately $8.7 million at the time). The 2026 estimate is CHF 7,000,000 to 10,000,000, with rough-equivalency context: the stone was cut from an 11.70-carat piece of rough discovered in Central Africa in the 1990s, and per Christie’s catalogue note no other natural diamond of this colour and size has ever been recorded by the GIA, a distinction the institute has held since its founding in 1931. Previews are running in Hong Kong April 27–29, then Geneva May 8–13. The market read on this lot will be the cleanest possible: same room, same diamond, same auctioneer, 12 years apart, with a published prior price. If it sells inside the estimate band, the trophy color-diamond market is healthy. If it sells above estimate, the K-shape thesis is confirmed at a level that should refocus every collector’s allocation thinking.
Sotheby’s Geneva Magnificent Jewels & Noble Jewels — May 2026. The Geneva Luxury Week sale will feature 46 highlights from an extensive private collection of signed 20th-century jewels — many of which have appeared in museum exhibitions and scholarly literature, per Sotheby’s catalogue notes — alongside an exceptional group of Cartier animal jewels assembled from several private collections. A complementary online-only sale, “Iconic Jewels: Her Sense of Style,” runs May 2 through May 16 and will offer more than 200 additional jewels from the same collection. The combination of a curated live trophy sale and a deep online catalogue from one provenance is the format we expect to see more of as the auction houses optimize for both top-tier records and broad mid-market liquidity.
Christie’s Magnificent Jewels Hong Kong — Wednesday, May 27, 2026. Christie’s Hong Kong will offer more than 140 lots at the Convention Hall in the Hong Kong Convention and Exhibition Centre at 2:00 p.m. local time, with previews running May 24 to 27. Per the Christie’s catalogue announcement, the sale spans coloured and colourless diamonds, Burmese rubies, Colombian emeralds, Kashmir sapphires, jadeite, and pearls — the full Asia-collector menu. The Sotheby’s Hong Kong April result is the immediate context: if Christie’s sees similarly strong sell-through, the case for sustained Asian demand at the top tier becomes the consensus read rather than a single data point.
The macro overlay: Fed at 3.50–3.75%, Bain’s 2026 return-to-growth call
Two pieces of macro context belong on top of the auction calendar. First, the FOMC at its March 17–18, 2026 meeting held the federal funds target at 3.50–3.75%, with an 11-1 vote (Governor Miran dissenting). The Summary of Economic Projections raised the 2026 GDP forecast to 2.4% and lifted both headline and core PCE projections to 2.7% each. The dot plot now shows a median of one cut in 2026 and one in 2027, with seven of 19 participants expecting a hold through year-end. The carry cost on cash is roughly 350–375 basis points. For an asset owner deciding between selling a trophy piece and borrowing against it, that carry-cost differential is meaningful: borrowing against a $5 million stone at single-digit rates while interest-bearing cash earns most of the carry back on the other side of the balance sheet is a different calculation than it was when rates were near zero, and it is the calculation many of our clients have been running.
Second, the Bain & Company global luxury outlook published in November 2025 (per Bloomberg’s November 20, 2025 coverage of the report) projected that the high-end goods market — including jewelry — will return to growth in 2026 at “low- to mid-single-digit growth over 2025 at constant exchange rates,” approximately 3% to 5%. Bain explicitly described 2025 as a “recalibration phase” and named jewelry the standout category across regions in 2025, “leading the early signs of recovery and setting a steadier tone for the market heading into 2026.” That outlook does not contradict the Rapaport polished-price decline or the De Beers $101-per-carat figure — it accommodates them. Bain’s call is on consumer-facing high-end goods sales, where margin and brand pricing power matter more than the raw input cost of stones. The two stories — soft rough, firm trophy — coexist exactly as the data suggests.
What an asset owner should do with this read
Three specific decisions follow from the data, and each one corresponds to a different position in the K-shape.
1. If you own a trophy-tier piece — a fancy color diamond, a JAR-signed work, a major Burmese ruby, a Kashmir sapphire, or a Cartier museum-grade jewel — the consign window is open and tight. The Sotheby’s Hong Kong 89% sell-through, the Mellon Blue benchmark, and the Ocean Dream’s return to the same Geneva saleroom that sold it in 2014 are all telling you the same thing: there is real, competitive money chasing rare, well-provenanced jewels right now. Auction-house consign deadlines for the autumn Geneva and Hong Kong sales are already on the calendar; a piece that is signed, papered with a contemporary GIA report, and has a credible provenance file should be evaluated against current trophy comparables before that window closes.
2. If you own mid-tier polished — generic 1- to 3-carat stones in standard goods quality — do not sell into this market unless you have to. Rapaport’s RAPI prints are negative across every standard category, De Beers’s average realized price is at $101 per carat, and the next leg of structural pressure (Anglo American’s divestment process, Signet absorbing James Allen into Blue Nile, the sightholder count cut from 69 to roughly 44–49) is unresolved. Liquidating into this print is a price-taker’s move. The owner-friendly alternative is to sit and wait, or to borrow against the asset rather than realize a loss-priced sale.
3. If you need liquidity now and your asset is jewelry — at any tier — the borrow-against-the-asset path is structurally more attractive in April 2026 than it was 24 months ago. The reason is the math we walked through above: with the Fed funds target at 3.50–3.75% and an explicit “higher for longer” rate stance documented in the March SEP, your cash on the other side of a borrow is earning meaningful carry. Borrowing against a high-end jewelry asset at single-digit rates, while cash pays in the 4-handle range, is materially different from forced-sale economics. It is also faster than an auction cycle: an auction consign-to-cash window is typically four to six months from contract to wire; an asset-secured loan is days. For an owner whose timeline does not match the auction calendar, this is the route that lets the trophy stay on the family balance sheet and the cash hit the operating account.
The bottom line
The April 29, 2026 De Beers report and the April 23, 2026 Sotheby’s Hong Kong result, read together, are the cleanest articulation we have seen of where jewelry sits at Q1 close. The rough market is in a measurable, producer-acknowledged downcycle — 19% lower realized prices, a 17% rough price index decline, an industry-leader divestment in motion, a sightholder rationalization underway. The trophy market is selling at high sell-through rates, with collectors paying through estimate on rare colour, signed design, and named provenance. The May 2026 Geneva and Hong Kong calendar — Phillips on the 11th, Christie’s on the 13th, Sotheby’s mid-month, Christie’s Hong Kong on the 27th — will deliver the next four data points, and the Ocean Dream’s outcome at Christie’s Geneva will be the cleanest single test, because it is the same diamond, same room, twelve years apart, with a published prior price.
The pattern across watches in Q1, art at the spring season open, classic cars at Amelia, and now jewelry at the close of April is now the same pattern: the top is bid, the middle is offered, the bottom is being repriced, and the most useful question for an owner is no longer “should I hold or sell” but “where in the K-shape does my asset actually sit, and which decision matches that position.” That is what the data this month says. The next three weeks will say whether the trophy line continues to compound — and whether the gap between the two arms of the K continues to widen.
Borro lends against fine jewelry, fancy color diamonds, signed pieces, and high-grade colored stones. If you are weighing a sale into the May auction calendar against borrowing to bridge into the next cycle, the comparison is worth running on real numbers. Speak to a Borro specialist about a confidential valuation and loan estimate.
