Le Scarf
The stitch is Purl Shell from Barbara Walkers Treasury of Knitting which I've renamed Treasury of Torture, since many of the stitches cause me to curse a lot.
Taking a Saturday morning stitch class at my LYS finally had me master it. It's really not as hard as I first thought, but definitely one of those stitches where you have to pay attention when knitting.
Up close look
I used four skeins of Merino Big Superfein from Lassa Grossa, which was 520 yards of yarn. This stitch is a bit of a yarn pig, as I didn't think I'd need the 4th skein, but used almost all of it.
All in all worth it because I think the scarf looks pretty unique. I've already started a purl shell scarf for me with different yarn. (Yes, for me. I know. Shocking.)