Is the gadolinium control leaking? The rare earth that scans your brain — a medical near-monopoly the customs basket can't see

Trade-flow companion to the price wedge (R72). The wedge measures scarcity (what a controlled material costs ex-China). This case measures the other half: is the control actually holding, or is controlled material re-entering the buyer through a laundered origin? This is a DUAL-SCORE / alternative-track signal — never folded into any Tier-1 exposure score. The divergence between "who China licensed to" and "who suddenly started shipping to the EU/US" IS the signal. Research, not investment advice; origin-relabelling is INFERRED from statistical implausibility plus public records, never asserted as smuggling on any single shipment.

Live chart + method: [/situation-room → "Is the ban leaking?"](/situation-room).

Verdict — GATE 0 (near-monopoly, medically load-bearing, basket-blind, leak state-confirmed)

Gadolinium is the corpus's first health-security chokepoint, and — like its sibling samarium — the dependency runs deepest exactly where the customs taxonomy sees least. Four facts sit on top of each other:

1. The control names it directly. On 4 April 2025 China's MOFCOM + GACC (Announcement No. 18) placed seven medium/heavy rare earths under individual, non-automatic export licence — samarium, gadolinium (Gd), terbium, dysprosium, lutetium, scandium, yttrium — covering metals, oxides, alloys (incl. gadolinium-magnesium alloy), and compounds/mixtures across 33 ten-digit HS lines. On 9 October 2025 Announcements 61/62 asserted extraterritorial reach (0.1% de-minimis, 50%-affiliate, foreign-direct- product) over foreign-made goods containing Chinese-origin controlled REEs, Gd explicitly among them; on 7 November 2025 Announcement No. 70 suspended the October package for the US to 10 Nov 2026 (Busan truce). The April licence itself is unaffected and remains in force.

2. The monopoly is near-total — and it is medical. China holds >90% of global gadolinium supply and ~99% of medium/heavy rare-earth *separation. The US Defense Logistics Agency has stated the United States is "entirely dependent on foreign sources for the acquisition and separation" of samarium and gadolinium, and awarded a contract to stand up domestic Sm/Gd output. But gadolinium's exposure is not mainly defense: it is the active metal in MRI contrast agents (gadolinium-based contrast agents, GBCAs) sold by Bayer (Gadovist/Magnevist), GE HealthCare (Omniscan/Clariscan), Bracco (MultiHance/ProHance) and Guerbet (Dotarem) — and the dominant burnable poison / neutron absorber* in commercial nuclear reactors (Gd-157 has a thermal-neutron absorption cross-section of ~254,000 barns, the highest of any stable isotope). A rare- earth control aimed at magnets and missiles also quietly threatens routine diagnostic imaging and reactor fuel design.

3. The leak is not merely inferred — the controlling state confirms it. In May 2025 China launched a special campaign against the smuggling and illegal export of strategic minerals, explicitly targeting "third-country laundering" and "mis-declaration / under-declaration," and said it had uncovered overseas parties moving controlled Chinese-origin rare earths. On 24 June 2026 MOFCOM Announcement No. 26 formalised a violation-reporting mechanism (effective 1 Jul 2026). As with samarium, the controlling state itself asserts that trans-shipment of the controlled basket is happening.

4. The scarcity half is priced. Gadolinium metal on the SMM benchmark stood at $61,732.93/t (~$61.73/kg) on 1 Jul 2026, +12.8% from $54,713.75/t the prior period; Chinese Gd-oxide spot reached 164,000–166,000 yuan/t by 25 Dec 2025 (a >2-month high), with China Southern Rare Earth lifting its listed oxide price. Origin-laundering only pays when ex-China material is genuinely scarce and dear — the wedge says it is.

So why GATE 0, not GATE 1? Because the two things that would let us quantify a gadolinium relabel both fail — as detailed next.

The origin shift — and why the table can't close

The EU import structure moved exactly as a leaking control predicts, but only at the rare-earth-basket level:

Source: Eurostat, "EU trade in rare earth elements increased in 2025" (news release 2026-06-29, Combined-Nomenclature rare-earth codes; free public dataset). Shares are 2025; the release does not publish a 2024 partner-by-partner split.

On its face this is the fingerprint — the controlling origin's share receding while Russia + Malaysia together take ~49%. But two corrections stop it short of a quantified GATE-1 relabel, and both are the honest part of the story:

• The customs code cannot isolate gadolinium. Eurostat's rare-earth lines

are a basket (mixed lanthanide compounds/metals). A gadolinium-specific surge from a low-capacity flag would be invisible inside a rising aggregate. Only China's own 10-digit lines resolve Gd, and those are not freely queryable from here. Internationally-comparable free data tops out at the HS-2846 basket — the same below-basket blind spot the samarium case hit.

• **The two surgers hold genuine — if narrow — gadolinium capacity, so neither

is a clean zero-capacity phantom flag: - Russia = Solikamsk (SMZ). Russia's *sole* separator historically shipped "basic carbonates and mixed powders rather than refined individual elements" (~2,500 t/yr finished) and is only *now* standing up in-house separation of individual compounds — explicitly including samarium / gadolinium / europium concentrates. So Russia's jump to ~26% of EU rare-earth imports is the more on-point leg for *gadolinium* specifically: some is genuine new SMZ output, but Russia was also in talks with China over rare-earth extraction-technology transfer (Sept 2025) — suggestive of a China-Russia blend/relabel vector, yet with the basket code this stays inference, not a traced relabel. - Malaysia = Lynas (LAMP, Kuantan). A *genuine* mode-B alternative (Australian-owned, Mount Weld feed) and in 2025 the first commercial separated- heavy-REE producer outside China. Its rise is real diversification of *other* heavy elements, not** evidence of gadolinium laundering; scoring it as such would be wrong.

The gadolinium-specific confound: Europe now separates its own Gd. Since April 2025, Solvay's La Rochelle plant (France) — the largest facility outside China able to separate the full rare-earth suite — runs commercial magnet-grade REE lines and explicitly lists gadolinium among its heavy-REE outputs (Sm, Gd, Y), targeting ~30% of the EU magnet-grade market by 2030 and scaling Dy/Tb by Sept 2026. Because La Rochelle is intra-EU it does not appear as an EU import — but it means any third-country Gd surge into the EU/US is now confounded between genuine ex-China separation and relabel, exactly the yttrium-Thailand ambiguity. Commercial shipment-count aggregators (e.g. Volza) list Belgium and Germany among the top Gd-oxide exporters despite ~zero primary separation of their own; that is consistent with European processing/distribution re-export (Solvay is Belgian-headquartered) and with relabel — the count data cannot tell them apart, so it is a watch pointer, not a traced table figure.

The transmission chain

`` China (>90% Gd supply; ~99% medium/heavy separation; GBCA + reactor feedstock) → [Apr-2025 licence on Gd metal/oxide/alloy/compounds; Oct-2025 extraterritorial reach] → leak paths China itself names: third-country laundering + mis-declaration · into the rare-earth basket (Gd invisible inside a rising aggregate) · via partial-capacity flags (Russia/Solikamsk Gd concentrate; blend/relabel) · behind genuine ex-China separation (Solvay Gd; count data can't separate) → buyer (EU/US hospitals, reactor fuel, industry), origin label ≠ economic origin ``

Common-ownership tell

N — not traced to a named entity. China's May-2025 campaign disclosed that "overseas organisations and individuals" moved controlled Chinese-origin rare earths, but the public record I can cite does not name a shell, namesake, or address linking a surging Gd exporter to a controlled Chinese producer (unlike the antimony Youngsun → Thai Unipet → Youngsun & Essen chain). Left as an open question rather than a fabricated hop.

Why it matters for the buyer

1. The corpus's first health-security blind spot. Every prior circumvention case reads as defense, energy, or industrial exposure. Gadolinium is the one where a rare-earth control lands in a hospital: ~one in three MRI scans uses a GBCA, and every major GBCA depends on Chinese-separated Gd. Surveys already show ~87% of radiologists concerned about contrast-agent supply and ~55% specifically about GBCA availability; Bayer's investigational gadoquatrane (~60% less Gd per dose) is a demand-reduction hedge that only makes sense against a real supply threat. A Tier-1 exposure model keyed to magnets and munitions misses the medical channel entirely. 2. The dependency is least visible in official data. A risk team reading "our rare-earth imports diversified — China is now under half" would score gadolinium as easing. For separated Gd the dependency is essentially intact, hidden inside a rising basket and behind genuine European output. Any model keyed on stated rare-earth origin over-credits diversification for a medically and reactor-critical element. 3. The control is binding — the controlling state says so. China's own anti-smuggling campaign independently confirms the Gd/REE control bites, in the same direction the price wedge prices scarcity. 4. Genuine diversification and circumvention look identical in the aggregate. Solvay's real Gd (mode B) and a hypothetical Russia/China relabel both lift a non-China share. Only element-level, capacity-aware reading separates them — which is why this stays an alternative-track signal beside, never inside, the Tier-1 score.

Caveats

• Inference, not proof. No figure here isolates gadolinium; the Eurostat table

is the rare-earth basket. A single Russian, Malaysian, Belgian or German shipment is innocent on its face. "Consistent with" and "fingerprint of," never "proves smuggling."

• Genuine alternatives explicitly labelled. Solvay/La Rochelle (France) and

Lynas/LAMP (Malaysia) are real ex-China separation (mode B), not phantom flags; do not read their output as circumvention.

• Data lag + basket resolution. Eurostat CN rare-earth codes cannot resolve

Gd; a Gd-specific relabel is structurally invisible to the volume-implausibility detector at this resolution. Element-level customs data (or GBCA-precursor HS granularity) would be required to move this toward GATE 1.

• Aggregator pointers are directional only. Belgium/Germany Gd-oxide export

rankings come from a commercial shipment-count aggregator, not a free official dataset, and are confounded by legitimate European re-export; they are a watch signal, excluded from the traced table.

• Suspension noise. The Nov-2025 US suspension (to Nov-2026) partially reopens

the direct US channel, which can mute the very relabel we watch for in the window it covers; the EU channel and the April licence are unaffected.

Anchor action: `2025-04-04-china-mofcom-heavy-rare-earths-export-licensing`. Sources — control: MOFCOM/GACC Announcement No. 18 (4 Apr 2025), Announcements 61/62 (9 Oct 2025) & No. 70 (7 Nov 2025), as reported by Holland & Knight, CIRS, CSIS, White & Case, Clark Hill, Taylor Wessing, IEA. Monopoly/defense & US reliance: CSIS, US Defense Logistics Agency contract reporting (Inspenet), USGS Mineral Commodity Summaries 2025. Medical/GBCA: HealthImaging, AuntMinnie, Applied Radiology, Imaging Technology News, Grand View Research (Bayer, GE HealthCare, Bracco, Guerbet; radiologist supply surveys; gadoquatrane). Nuclear: nuclear-power.com, Stanford Advanced Materials, ScienceDirect (Gd-155/157 cross-sections; burnable poison). Ex-China separation: Solvay press releases & IM-Mining (La Rochelle Gd line, Apr 2025); Lynas / Discovery Alert & S&P Global (Russia/Solikamsk Gd concentrate + China tech-transfer talks). Trade: Eurostat news release 2026-06-29 (rare-earth basket). Price wedge: SMM via rare-earth-mining.com (Gd metal, 1 Jul 2026) & metal.com (Gd oxide, Dec 2025). State enforcement: MOFCOM special campaign (May 2025) & Announcement No. 26 (24 Jun 2026) via Global Times / Morgan Lewis. Presented as the publicly-reported mechanism — NOT a per-shipment accusation beyond what the public record states.