Of all gems, Diamond (Dia) is the most visibly treasured by their peers. This is thanks, in large part, to Dia’s beauty, but Dia also has a sincere, genuinely nice personality that’s difficult to defy. Even when the most irreverent of all the gems, Phosphophyllite (Phos), jokes that Dia is too blinding, this is later followed up with a statement that Dia doesn’t have to change, their kindness is enough.
By examining the daily life of humanoid gems, Land of the Lustrous muses on the meaning of a life, survival, living, and purpose. No individual story is as heartbreaking or as complete as Dia’s journey by series end, giving ample fodder for discussion.