Well darn. I had never heard of crocheting / knitting with clay before. Just goes to show you that the good ideas have already been thought!
what kind of hook did you use?
I used the biggest hook I had, a really long I. It would very easily work on a bigger needle, and probably the bigger the better. The clay would snag and stretch out if it fell too far into the little dip of the crochet hook. I mainly knit, so I'm very much a novice at all the names and techniques of crochet.