I once found in internet photos from some spiral beads beaded from seed beads. Because I really liked them, I figured out how to bead spiralbeads.
The instruction is in German, but I drew explaining pictures that (I hope ;-)) say it all.
You begin in the middle. First you increase the circumference of the bead in the first 3 rows, then in rows 4 and 5 you work straight to create the sides of the bead and from row 6 on you decrease in the same way you increased before.
I then created the necklace *Summer, Sun and Spots* and the bracelet *Little Black Dress* with such spiral beads.
The beaded strings for the necklace where made in tubular peyote stitch (here an English instruction). After having finished them, I sewed them on.
The bracelet ‘strings’ where made in flat Herringbone weave (here an English instruction).
Beaded Spiral Beads (in German)