If you love the swirly colours of Mosaic Green - you're just going to be disappointed in this. If, however, you are looking for a really deep, dark intense blue to pull stringers and make filigrana with, then this might be your blue.
It's a very dark blue - so dark, that it can read as black in low lighting. In order to show it off, you'll have to dilute it by layering it over clear or white or other light colours.
From the left, this is Mosaic Blue over ivory, a self-coloured bead, mashed, and a self-coloured spacer.
When you hold the self coloured beads up to a strong, incandescent light, they show as an intensely dark blue with a hint of violet. If you could manage to layer it over clear and get that effect - shards maybe - it would be awesome.
More experimenting needs to be done to make this glass really show well.