What color is the base glass? if it's transparent blue (which it appears to be) then not an Angel which requires a muddy cream colored base glass. Cool marble none the less and by the way I'm getting twisted up Pelt Rainbo vibes here.
I'm with Steph it looks like an Inkie with some additional white, I've never seen any Moody Blue's with that light of a base glass in fact all of the Blues that I've seen have had a very similar brown base glass.