Cs

Cesium

Price

Cesium Pricing and Market Data

Cesium has no exchange-traded price. Cesium formate brine is priced through private contracts at roughly $78,000-100,000/tonne of brine. The market is extremely small (only ~40 tonnes/year of contained cesium) and dominated by a single supplier (Sinomine, through the Tanco mine). Cesium formate drilling fluids are typically leased rather than sold outright, with the brine recovered after drilling operations, making cesium one of the most unusual commodity markets. High-purity cesium compounds for laboratory and atomic clock applications command far higher prices per gram.

Current Price

80,000-100,000

$/tonne (Cs formate brine)

Benchmark

Private/Cabot/Sinomine

Annual Production

40

tonnes

Top Producer

Canada

82% share

Pricing Mechanisms

Cesium is priced using benchmarks from Private/Cabot/Sinomine. Cesium pricing operates through a combination of exchange-based benchmarks, price reporting agency assessments, bilateral negotiation, and long-term offtake contracts. The specific mechanism depends on product form, grade, and the buyer-seller relationship.

Price History and Notable Market Events

The Cesium market has been shaped by the following key events:

2019

Chinas Sinomine Resource Group acquired the Tanco mine from Cabot Corporation, giving China effective control over the worlds primary cesium source

2020

Sinomine also acquired Bikita Minerals in Zimbabwe, consolidating control of two of three known pollucite deposits under Chinese ownership

2023

US and Canadian officials raised national security concerns about Chinese control of the Western worlds primary cesium supply from the Tanco mine

Price Drivers

Key factors influencing Cesium prices include production levels in Canada (82% of global supply), demand from atomic clocks and gps systems and oil and gas drilling fluids, inventory levels, energy costs, and government policy actions such as export restrictions or strategic stockpiling.

Spot vs. Contract Pricing

The Cesium market features both spot transactions and longer-term contracts. Spot prices reflect current conditions and are more volatile, while multi-year offtake agreements provide supply security for both producers and consumers. Current spot pricing is in the range of 80,000-100,000 $/tonne (Cs formate brine).

Return to the Cesium hub page or browse the full Mineral Library.