Wow!! What a great accomplishment! Your little 9 patches are beautiful.
Yes, it's "Jack's Chain". Rainbow of Rings is a new name for it.
In the last Paducah quilt show I went to, I saw one that was done with Kaffe Fassett fabrics and the center hexigons were kaliedoscopes of Kaffe prints. (Just in case you want to try another one.... ha ha ha!)