lithium

Updated: May 24, 2025

Here again nature offers us an instance which, 'worth a thousand', reveals a secret that would otherwise remain veiled. We refer to the pink crystals of tourmaline, whose colour comes from a small admixture of lithium. If exposed to a flame, however, it endows it with a definite colour which is the same as that of the lithium-coloured tourmaline.

Ernst Lehrs - Man or Matter