you could try to replace the noise with marble and try to tweak it a little.
the problem with the procedural texture is, that you cannot scale it in two directions, only global.
maybe someone has a "magic" trick to it, that I don't know, so you could scale y and x direction separately.
the 60% transparency map should help you to control the transparency of your material.
you should find it under textures in your library ! you simply drag it onto the transparency
I used thinfilm to give you the possibility to mimic the iridescent effect, but knocked it down a bit while playing with fraction and thickness (properties of the material). you could tweak that to your purposes.