Bio: Cassiterite worked as an aid to Black Diamond, helping her make decisions about what to do. She was close to Black Pearl, since she saw her almost daily. At the time of Black Diamond's demise, she was off of the moon that the Paradise was on. On the return trip, she and her crew found out about the shattering, and tried to find a place to escape to. But all of Black Diamond's gems where to be shattered, so they where hunted down. Only she survived, by pretending to crash her ship. The gems hunting her down assumed her dead, and left her alone. She was captured by a group of Sneple, and was imprisoned. She managed to escape thanks to another gem captive, and they both left the planet. The gem droped her off on a remote planet, before leaving her forever. Cassiterite then met Onyx, Black Pearl and Amethyst. Later she met Zeik.

Gem: Chest

Weapon: N/A (dosen't use one)

Likes: Helping out, discussing matters with others, finding a resolution

Dislikes: Arguments, other aliens specify Snakepeople, and when others don't listen to her

Personality: Professional, but friendly. She will go on about how this is the right way to do something, but she does it because she wants everything to be perfect for everyone. She will often try to stay out of the dirty work, not really being able to fight, but will always be telling you how you can better your skills.

Relationships: Good friends with Black Pearl, less approving of Amethyst, good friends with Onyx, dislikes Zeik.