Chart and picture tutorial (no written directions)
The pictures are awesome. And a great tutorial on how to block your snowflake.

Yarn … pattern says Sport but it probably should be heavy lace weight (360 yards in 50g)

The 4 cream snowflakes are crocheted with Piper and the pure white and blue ones with size 10 crochet thread. I liked the off white ones better … they are a bit fuzzy.