The ice looks a bit like opaque plastic rather than ice, there's no sense that it's transparent. To show transparency, you could draw in the other facets of the crystals visible through the front. If you use some of your midtones instead of using your lightest and darkest colours for it, it shouldn't look too confusing/busy.
Ice, Some Ice avatars, Some Ice icons, Some Ice pixel art, Some Ice forum avatars, Some Ice AOL Buddy Icons
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The ice looks a bit like opaque plastic rather than ice, there's no sense that it's transparent. To show transparency, you could draw in the other facets of the crystals visible through the front. If you use some of your midtones instead of using your lightest and darkest colours for it, it shouldn't look too confusing/busy.