[Mulling things over, it is Sheena and Tazendra asking about different colors that reminds the Assassin of a note that she found on a lower floor. She'd shared it with Sephiroth when she found it but only now remembered to bring it up to the others as it began to make sense.

Unfolding the paper she gives it another look over before holding it out to the group.]

I found this tucked away in one of the smaller rooms lower in the tower. I cannot say for certain but it seems that their blue and green crystals were intended for defense. T'would seem that the gold and diamond crystals would be of use to us all, if we can find any.