vt.physics on Instagram: "What's Really Inside a Lighter Spark #science Ferrocerium is the metal alloy used in most lighter flints, and it is engineered to produce sparks. It is made from a mix of rare earth metals, mainly cerium and lanthanum, combined with iron and other elements that make it extremely reactive. When the lighter’s steel wheel scrapes against the ferrocerium rod, it shaves off tiny particles of the alloy. These particles heat up almost instantly from the friction, and because f