Icy Rubik's cube experiment

A render made a while back to try creating a Rubik's cube made of individual, coloured, ice cubes.

Really wanted to try fake a good frosted glass/ice material, on the main body, but it got even more tricky to pull that off with the thin, coloured faces.
Didn't come out quite as hoped for, but still worth a try. Maybe it's time to start looking at Octane, as Cycle's glass just can't handle glass very well rn😗

Any feedback on achieving better coloured ice and/or frosted glass material in Blender's Cycles welcome