I've been twiddling with opalescent / pearlescent shaders for a while now here and there. Nothing like these though

Heres a nice bead store that sells freshwater pearls in fantabulous colours and tiny amounts.  I've bought some from there .. some very interesting subtleties to the colours in rl. Photos never do pearls justice

http://www.eebeads.com/_freshpearls.htm

I do want to try splicing your candy colours with my (old now) chromalusion colours and see what happens.   You can google chromalusion for images .. its a very funky colour-depending-on-angle paint setup from DuPont. Hideously expensive

Lyrra