This is Snowflake #64 in the book of 100 Snowflakes. Instructions are on Page 81. It is pictured on page 32 in the showcase.

“The namesake of this regal design is a cold and squally wind in the fjords of Norway.”

Finished diameter: 3 1/2 in (79 mm)
Thread required: 9 yd (8.2 m)

All pattern samples in this book are made with size 10 thread and a size 5 (1.9 mm) crochet hook.