The US and Israel’s conflict with Iran has drained munitions at an astonishing rate. This is placing pressure on the supply of a crucial metal: tungsten. Tungsten is used in armour piercing munitions, in components that need to withstand high levels of heat and is an important additive in steel. Militaries around the world would grind to a halt without this strategically important element. Yet, despite the current demand, the amount of tungsten mined each year is dwarfed by other metal ores, such as iron and aluminium (bauxite). In addition, most of the world’s tungsten comes from China, which has recently placed restrictions on supplies. For some countries, including the UK, the push to secure new tungsten resources has never been more vital. The English name for tungsten, comes from the Swedish “tung sten”, meaning heavy stone. Tungsten’s extreme hardness and resistance to thermal shock are what make it sought after for military technology. In armour piercing munitions, dense tungsten alloy rods use the sheer velocity of their impact to tear through the armour on …