|Paris—Paul-Émile Lecoq de Boisbaudran elements|
Dmitri Mendeleev predicted gallium and called it “ekaaluminium.” Paul-Émile Lecoq de Boisbaudran discovered gallium in a sample of sphalerite by its two violet spectral lines and he subsequently isolated it using electrolysis of gallium hydroxide.
Atomic number 31
Unusual metal alloys, high-speed semiconductors, and artificial garnets.
If you handle the metal, extremely fine droplets of liquid gallium wet your skin. This kind of thing, bizarre and independent, does not exist in our normal experience.