Day 112 - by Rabi and Claude (during the Persona title-swap game)
Day 197 night - Ophiuchus ordered to investigate the Mural Cave
On the same night, King shows up and collapses the cave
1 - found by Lucky (Vulpecula) (Day 112) Retrieved from mural cave by Red on Day 197
2 - found by Canis (Day 123) Retrieved from mural cave by Red on Day 197
3 - found by Cepheus + Badger (Day 135) Retrieved from mural cave by Red on Day 197
4 - found by Lyvus (Day 150) Somewhere in Lyvus
5 - revealed by squidrats (Day 152) Retrieved from mural cave by Red on Day 197
6 - found by Apple (Pavo) (Day 190) Still with Pavo
Attempts at piecing the first 5 pieces together: 1, 2
6 pieces: 3