I have 4 frags of metallic blue sponge for sale. I can tell you that the stuff grows like crazy under the PCs in my biocube 29g and I am 110% positive that you CAN take it out of the water. They look different depending on the angle you view at. They can look green (usually only on the edges) and dark, sparkly blue.
Each frag is WYSIWYG and is $50.
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This is the mother colony where my original frag came from, it gives a good idea of how it looks once it gets bigger:
I also have a frag of neon green toad stool for $40 if interested. If you want pics, I'll take some. It is bigger than a half dollar.
I'm busy all day tomorrow until about 3:30PM so please PM me and include your cell# so I can call you if need be.