CDEG

THIS IS IT!

YOU HELPED GET ALL OF LUNA'S BELONGINGS. IN RETURN, SHE SHARED WITH YOU A SECRET THAT ONLY SHE KNEW. SHE TOLD YOU WHERE TO FIND
ROWENA RAVENCLAW'S DIADEM!

YOU HAVE ANOTHER HORCRUX IN YOUR HANDS, SO YOU CAN MAKE VOLDEMORT AN EVEN MORE VULNERABLE!

Note: 
The red key is in the first place 
The value of the white key is 4