Y0ur_l0cal_weird069
In the mysterious future, crystalline organisms called 'Gems' inhabit a world that has been destroyed by six meteors and turned into a vast Blank State in the process. Each Gem is assigned a role in order to fight against the Shaderians, a species from the moon who attacks them in order to shatter their bodies and use them as decorations, Chip Bag, who is a young and fragile Gem who dreams of helping their friends in the war effort. Instead, they are told to compile an encyclopedia because of their delicate condition. After begrudgingly embarking on this task, Chip Bag meets Pitchfork, an intelligent and wise gem who has been relegated to patrolling the isolated Blank State at night because of the corrosive poison their body creates. After seeing how unhappy Pitchfork is, Chip Bag decides to find a role that both of the rejected Gems can enjoy.
(Also available on AO3!)