[He seems to ponder that for a moment, brows knitting together.]

Stones of blue hues are generally what I have on hand...they are not just for decoration, you know. Many of them have special properties and they influence me directly. They might aid me in harnessing the power I use to guide the sea waters, or protect me from sight from immediate predators so as to avoid needless conflict. I of course would choose something according for your friend.

However...

[...he feels so, so rotten about the situation in which Choromatsu can't really remember the problem to begin with. That's why, after a moment, he continues.]

I would be willing to create new stones for you in different colors, if you would like. It would take me a few days.