Fresnel gradient shader? I've tried my hardest to try and replicate this style, but can't for the life of me get anywhere near it. Is anyone able to get close to this style?
You can get nice results using the Layer Weight node.


Mix two glass shaders. One with IOR=1 (no refraction), other with high IOR
Layer Weight - Facing to drive the mix shader
Use Color Ramp to control the edge effect