This is Snowflake #1 in the book of 100 Snowflakes. Instructions on Page 44. Pictured on page 22 in Showcase.

“This small, sharp-edged flake is named for the Barber; a blizzard of show and ice in the Gulf of the St. Lawrence.”

Finished diameter: 2-1/8 in. (54 mm)
Thread required: 8 yd (4.6 m)

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