From Granblue Fantasy Wiki
Prism Chips are primarily used to uncap characters. They are needed for early stars on R and story SR characters.
|Uncap R to 1★||1|
|Uncap R to 2★||1|
|Uncap story SR to 1★||1|
|Buy 1 Flawed Prism from the Treasure shop||3|
|Forging Class Champion Weapons||50|
|Rebuild Class Champion Weapons||120|