User blog comment:ChishioKunrin/Dust Speculation and Whatnot/@comment-25958301-20150112164229

I'm not sure if I'm seeing things but I'm sure there's a black colour in the Dust-infused magazine Wiess gives Blake. Could be the dust for the stone, since the shadow clone one appears to be related to the purple dust.

Here's an link just to point out the black(?) dust: http://prntscr.com/5rm13b