phosphophyllite
Main character of the manga Houseki no Kuni and its anime adaptation.
At the beginning of the story, Phosphophyllite (frequently shortened to フォス/Phos, both in-universe and without) is a bubbly but clumsy member of an androgynous humanoid race called "Gems". Like all Gems, they are composed almost entirely of their namesake mineral: a rare, fragile and green zinc phosphate hydrate.