This is Snowflake #57 in the book of 100 Snowflakes. Instructions are on Page 76. It is pictured on page 30 in the showcase.

“This simple and icy design takes its name from a cold gorge wind that blows in the Pyrenees.”

Finished diameter: 2 3/8 in (60 mm)
Thread required: 6 yd (5.5 m)

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