I am new to gathering collectibles. I am trying to get script. My understanding is that I turn in certain collectibles in order to get that.

I have been flying around Dravanian Highlands stopping at every BTN and MIN node I see.

I have collected six different Rainbow Pigments with the following collectability ratings:
273, 412, 450(3), 525. None of them stack.

Are they worth anything? What can I do with them?