two toned glossy material

How would I create this sort of two toned material?
It seems to be possibly a red transparent sphere with a purple sphere inside but that doesn’t work for either the sphere shapes or the strands.
Its a transparent red in shadow areas and purple in highlight areas with a high secular white sheen.
I’m at a loss at where to start. I played around with volume absorption and transparency but didn’t get any where.
Does anyone have any idea?
Thanks for your help