Tracery is a traditional triangular shawl that's knitted from the top down. The main body is worked in
a simple lace pattern from the neck down towards its large scale pattern edging.
The edging is worked back and forth, sideways, once the body has been completed. The sample, here, is knitted in The Yarn Garden Temple Juniper mohair and requires only one 500 yard skein to complete! Temple Juniper is a gossamer-fine yarn, with fab yardage to a skein that both knits and wears beautifully. You can use a whole number mohair yarns to make it, and I list some of the options on Ravelry's pattern page. Saying that, I think a good fine non-mohair lace would make it a stunning shawl too.