>>149980792
Yeah, there was a quest in legend of mana involving gem like people who's entire being originated from their cores. Key plot points were stolen and inserted in Steven universe.

>Ancient gem war
>Gem who's memory was wiped and was living as another gemGem who's memory was wiped and was living as another gem
>caste system
>Weapon materialization
>Gem sealed in Mirror communicating to another people through said mirror
>healing tears
>jewel beasts/corrupted gems
>cluster

Difference is that this game actually executed it well.