This is Snowflake #28 in the book of 100 Snowflakes. Instructions on Page 58. Pictured on page 26 in Showcase.

“This delicate snowflake is named for the winter north wind in Spain.”

Finished diameter: 2 3/4 in. (70 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.