Strategic metal
TelluriumSolar demand, copper-refining supply.
Tellurium is used in cadmium telluride solar cells and thermoelectric materials. Much of its supply is recovered during copper refining, making the amount refineries choose to recover part of the demand story.
Explore the case
- Material
- Te
- Key uses
- Thin-film solar and thermoelectrics
- Supply to understand
- Recovery from copper refining
On this page
Tellurium in detail
Tellurium is a rare metalloid critical to high-efficiency solar panels (CdTe thin-film technology), cutting-edge semiconductors, and advanced thermoelectric devices. Its unique electrical and optical properties enhance phase-change memory, infrared detectors, and high-performance alloys, making it indispensable in renewable energy and next-generation electronics.
Demand is surging due to the global expansion of solar energy and emerging semiconductor applications, yet supply is inherently constrained – Tellurium is only extracted as a minor byproduct of copper refining. With China dominating production and growing supply chain concerns, Tellurium presents a compelling strategic investment in the clean energy and tech sectors.
China refines four of every five listed tonnes of tellurium.
Russia and Japan are the largest visible alternatives, but neither reaches 7%. Sweden's concentrate is a different product and stays outside this comparison.
China listed output
800 tonnes1The listed refinery table totals 1,000 tonnes.
Best current alternative
Russia: 67 tonnes1Russia is the second-largest country in the same refinery table.
Next current alternative
Japan: 61 tonnes1Japan ranks just behind Russia. Sweden's separate 48-tonne entry is concentrate, not refinery output.
Why Invest in Tellurium?
Tellurium is a rare metalloid critical for cadmium telluride thin-film solar panels – 55% of new US solar installations – and bismuth telluride thermoelectric devices for waste heat recovery. Secondary uses include machinability additives in steel and copper alloys, semiconductors and specialty optics. These tie tellurium directly to solar deployment, industrial energy efficiency and advanced electronics.
Production depends almost entirely on copper refining, with over 90% recovered as byproduct from electrolytic anode slimes. China controls 67-76% of refined output and critical downstream processing. Global production runs just 500-600 metric tons annually – far below amounts available in copper refineries, reflecting severe underrecovery driven by low byproduct priority. China imposed export controls on tellurium and cadmium telluride in February 2025, adding immediate supply risk.
For investors, tellurium is a byproduct paradox – essential to fast-growing solar markets yet entirely subordinate to copper economics. Supply is microscopic, processing heavily concentrated in China, and availability driven by copper cycles not tellurium demand. Export controls compound structural vulnerabilities, creating a market defined by extreme scarcity, opacity, price volatility and acute geopolitical sensitivity.
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Tellurium Price Trends
Who produces tellurium?
Tellurium Demand and Market Outlook
How to Invest in Tellurium
Investing in tellurium presents unique challenges, as it is not traded on major commodity exchanges and lacks standardized futures contracts or ETFs.
Unlike gold or silver, there is no widely available spot market, and pricing is determined through private negotiations between buyers and sellers, making price discovery opaque.
The most common way to gain exposure is through publicly traded copper and base metals mining companies such as Boliden, Teck Resources, and Freeport-McMoRan, which produce tellurium as a by-product of copper refining. However, their revenues are influenced by broader copper markets rather than tellurium specifically.
Direct Invest
For direct investment, acquiring high-purity tellurium metal (99.99%+ purity) or powder from specialized dealers is an option. Professional storage can support safekeeping and resale; confirm the product specification, storage costs and resale terms before buying.
As a critical material essential for cadmium telluride solar panels, thermoelectric devices, and advanced metallurgy, tellurium represents a compelling, though highly specialized, investment opportunity in the technology metals sector.
Buying Tellurium with Us ($10,000 Minimum)
We handle the procurement of the metal, secure insured storage in bonded facilities, and eventual liquidation of the position at the client’s request: providing a seamless end-to-end investment service.
* Not financial advice. Industrial metal buying is not a regulated investing space.
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Looking to buy Tellurium for Industrial usage?
This page is focused on Tellurium as an investment asset (buy and hold). For industrial purchase of Tellurium please, click here.
Before you decide
A useful thesis has a question behind it.
Can additional recovery at copper refineries meet growth in demand from the solar technologies that use tellurium?
Use the research above to test the case. Then check the exact material, purity, available quantity and resale terms against a dated quote.
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