Tellurium is classified as a “critical” or “green minor” metal1. It represents one of earth’s rarest elements and, along with silver, is a key constituent in the manufacture of solar panels. Tellurium is also essential for production of optical discs (such as CD-RW and Blu-ray) and the performance of next-generation lithium-tellurium batteries, potassium-tellurium batteries and a wide range of advanced electronics products including phase change memory chips.

Rarer than gold and produced generally as a by-product of copper refining, tellurium’s increasing demand worldwide means that new sources must be developed. Solar panel manufacturers and other users are now seeking primary sources of tellurium not reliant on copper refining. Ideal sources are those in mining-friendly and stable jurisdictions and where tellurium is abundant along with precious metals that can supply silver and also offset production costs.