Sometimes underwater photos help show what's inside clear marbles like that.
I was about to say that's a long seam, which could add to the Pelt possibilities ... but it has a pronounced V-shape, doesn't it. And the ribbon that I see doesn't go all the way to the seam.
I"m leaning Master now, because of the V-shaped seam and because two skinny ribbons which don't actually go to the seam are pushing me away from Pelt.