I have never even heard of crotchet wire, and this is absolutely BEAUTIFUL!!! I've seen crotchet for necklaces using traditional materials, and macrame using wire, but this is totally new to me. Great work!
Those are actually pretty simple to make. Thread the beads on the wire and then crochet a normal string while pulling bead after bead into the loops. And then I wrap the strings around each other to achieve a bit of a chaotic look. Other people make much more delicate ornaments like flowers from thin silver wire, that's something I lack the patience for.