In a world inhabited by crystalline lifeforms called The Lustrous, every unique gem must fight for their way of life against the threat of lunarians who would turn them into decorations. Phosphophyllite, the most fragile and brittle of gems, longs to join the battle. When Phos is instead assigned to complete a natural history of their world, it sounds like a dull and pointless task. But this new job brings Phos into contact with Cinnabar, a gem forced to live in isolation. Can Phos's seemi...

Phosphophyllite is determined to find the truth about Kongō. Despite the other gems' hatred of the Lunarians, Phos tries to get closer to them in an effort to communicate. But the work is dangerous, and Phos realizes this job might be more than one gem can handle…

Phosphophyllite is determined to find a job more suited Cinnabar's many talents, but with no easy answers to be found on land, the quest turns seaward. Ventricosus the sea snail suggests that the creatures who live there may have the clue Phos is looking for. But the sea is hardly the optimal environment for a gemstone-will Phos make it back to shore in one piece?

Phosphophyllite is on the war path, determined to make Kongo pray at all costs. The other gems attempt to protect their precious Sensei, but can they stop the vicious onslaught? Meanwhile, on the moon, Cairngorm demands an explanation from Aechmea...

Having inherited Kongo's memories and abilities. Phosphophyllite finally completes the long awaited prayer, sending the Lunarians into the void. Now truly alone, Phos can only await eternity in silence-that is, until an unfamiliar mineral lifeform comes along, inspiring deep contemplation of the events that have transpired over these thousands of years… FINAL VOLUME!

Spring has sprung, and the all the other gems are awake to see Phosphophyllite's transformation. They are impressed with Phos's new arms, and our hero can hardly stand the newfound popularity, especially when it attracts the scariest gem of all…Bort now wishes to be Phos's partner in battle.

Now that Phosphophyllite's head has been taken to the moon, there's only one way to revive the defeated gemwith a risky head transplant. For better or worse, Lapis Lazuli's head is available, but more than half of Phos's original body has been lost. Assuming the transplant even works, will the resulting gem still be Phosphophyllite?

The quest for the truth continues as Phosphophyllite finally begins the journey to the moon, hoping to communicate with the Lunarians after so many failed attempts. While the gem is shocked and angered to learn that the enemy has been able to speak all along, this also means that they can provide answers. Will Phos be able to handle the truth?

Phosphophyllite has been immobilized in battle, with no one but Ghost Quartz around for backup. Both must last through the Lunarians' relentless attack until help arrives, but it's a tall task for this newly-minted pair. Will Phos's partner be just another casualty in the ongoing war?

Now with new legs, Phosphophyllite is ready to go to battle. But when that new strength is needed the most, Phos is too scared to use it. Mortified by this failure, Phos undertakes the self-imposed punishment of staying awake all winter while the other gems are asleep. But winter has its own share of dangers…

Two hundred years after a failed attack on the Lustrous, Phosphophyllite is reassembled and tries again to get Kongo to pray for the Lunarians. This attempt seems likely to succeed, and the Lunarians prepare to depart to nothingness, while the gemstones on the moon prepare to be left behind. Meanwhile, Euclase is awakened by the commotion between Phos and Kongo…

After failing to get Kongo to pray for the Lunarians, Phosphophyllite returns to the moon to regroup, but Padparadscha has been covered in Cinnabar's poison, and Yellow Diamond has taken a severe psychological blow. Now Phos must come up with a new plan, but ideas are in short supply. Meanwhile, Cairngorm and the other gems are finding life on the moon to be surprisingly agreeable …