I had to add this photo into my digital journal. This is such a unique collar and I've never seen something so beautiful. Apparently this is called a kimono silk cats eye collar. I think drafting this type of collar would be best but draping it could also achieve the base of it, without the cut out. I believe lightweight and medium weight fabrics would suit this.
Vivetta's Collars Add a Quirky Touch to Your Everyday Attire