If you're into unique illustrations( with a focus on form and utilising space emotively) I'd definitely recommend Houseki no Kuni aka Land of the Lustrous.
{Fun fact: my name is kinda inspired by Phos. Except I am organic and contain phospholipids not phosphophyllite lol}
It is about a group of humanoid, genderless gems living on an island far in the future, when humanity is long gone, and the earth has additional moons. With the guidance of their mysterious sensei, they ward off attacks from bodhisattva-like beings from the moon, who they're told collect them for jewellery.
Phosphophyllite, the main character, is too weak to fight and not particularly good at anything. They want nothing more to be strong, and are willing to put themself in danger for it..
Its also got probably the only anime for which the CGI is a highlight.