Function of Mentee Coins Super Stones

hi,

in the description of mentee coins super stones (+60) / (+150) it says:

"additional elemental attributes cannot be bestowed."

does this mean that i won't be able to get an armor part to 120 when using those stones?

or is it possible to use regular attribute crystals on armor parts even after having used the super stones +60 from the mentee coins?

i didn't find an answer on that, maybe any of has already tried out.
thank you.

 

you can use crystals to get your armor to 120 when you use this stone. description is trying to explain that you can't use normal stones to +60 and then the special stone to get 60 more (hence getting 120 that way)

 

thank you.