I worked on Faux Pearl this weekend, I like the results, I found the tutorial in French, I used 1 parts translucent to 2 parts pearl clay. I used perfect pearls to color it. She said she found the tutorial online also! her pictures are self explanatory.
here is a link to her site
http://lesethiopiques.over-blog.com/article-tuto-nacre-67620442.html