Pattern is written using U.S. Terminology.
The Snowflake flower pattern consists of 9 rounds and of four levels:
The stamens
Narrow petals
Large petals
Bottom leaves

If you want to make a brooch from this snowflake., you can also crochet a circle that covers the back.

Crochet skill level is advanced.

It is better to crochet from yarn that holds shape well in the finished product. From soft yarn, the Snowflake will also be soft. Starching or similar processing may be required. If you crochet loosely, it is better to crochet with a thinner hook.