This is Snowflake #14 in the book of 100 Snowflakes. Instructions are on Page 50. It is pictured on Page 24 in the Showcase.

“This lovely, flower-centered flake takes its name from a Greenlandic word for old sea ice trapped in fjords.”

Finished diameter: 2-1/4 in. (57 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.