White
Yellow
Tiger Eye
Rose
Summer-sky
Purple Dusk
Opal
Green
Sapphire
Red
Gray
Ebon-gray
Black
Opal is the dividing line between lighter and darker Jewels because it can be either.
When making the Offering to the Darkness, a person can descend a maximum of three ranks from his/her Birthright Jewel.
Example: Birthright White could descend to Rose.