This is Snowflake #54 in the book of 100 Snowflakes. Instructions are on Page 74. Picture is on Page 31 in the showcase.

“This little flake might have come in on the Juran, a cold, snowy wind blowing from the Jura Mountains in Switzerland.”

Finished diameter: 2-1/8 in. (54 mm)
Thread required: 4 yd (3.7 m)

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