Discovered in the early 1800s from a chunk of smuggled platinum ore, rhodium is the most valuable precious metal on the ...

Rare earth elements are essential for modern military and civilian technology. They’re found most often in hard-to-reach ...

Despite their name, these metals are not rare in nature, but can be hard to extract and separate from the ore that surrounds them such that demand is outpacing supply. As the world moves away from ...

China's recent decision to ban exports of certain rare metals with potential military applications to the U.S. sends a clear ...

Online estimates suggest saffron can retail for anything between $10 and $20 (£8-£15.90) per gram. This silvery-white metal is one of the rarest metals in the world. It's a key component in catalytic ...

(CNN) — Millions of tons of coal ash left over from burning the planet’s dirtiest fossil fuel are sitting in ponds and landfills, able to leach into waterways and pollute soil. But this ...