@Asingh89 what alucarrdd said, Antarcticite and Phos' original head can't be restored since it's less than 5 hardness. That means they probably have no choice but to restore Lapis, while killing Phos (if moon boss is not lying about this). Phos probably think they (Phos) have no future at this point.
The real villain in the series is the person that built Sensei. Can't even frigging tell them the whole truth about why he stopped serving his primary function, which is the root of the entire fuckin' conflict.
they obviously manipulated the synthetics...like phos's pearl, padparadscha's filler, and cairngorm's eyes...oh god this is so depressing the moon men are pretty but evil
Bort's hair was so iconic. RIP.
It's really touching to see the Gems back on earth coax Sensei into becoming more like their companion than their leader.