Diamond

Diamond is a planet that formed from Gemonia.

Season 2
The only season when he appears. He formed in Disaster on Jupiter. He helped Greeney against Potira, Yolcky, Muoy, and their boss in A New Member in Greeney's Family. He and other gems united into Gemonia back in The Virus Outbreak.

Season 3
He only appeared in Gemonia Falls Apart and Free Neptune.

Relations
Greeney - I help him!