I bought some lovely 4 ply yarn at Needlepoint Ogden Utah when I was travelling through last year. It was called Dream , Jilly Cashmere. I didn't have quite enough to to do the whole shawl, so I mixed it with some Drops Alpaca (grey). The shop was fabulous - check out the link.
This pattern is based over 14 rows and has a garter row on rows 6 and 12. So I did two stripes in blue to one in grey. I did have a little blue left over but the shawl was big enough for me at this point.