Professor McGonagall's garb

[nightngle]

Hi! I'm new to the group, and glad I found you! :)

My hobby is making garb (historical and some fantasy), and being a 
fan of HP, I'm considering doing a costume recreation of Professor 
McGonagall (I want a new costume for myself, and she is the best fit 
for me).

I've just started my research, but thought I'd ask you fine folks for 
some help as well. For her professorial robes, she wears a beautiful 
brooch at her neck. I know I've seen this shape, but so far, I'm not 
finding it. Does anyone have an idea what this brooch would be called?

The other jewelry she wears is a small circular pin on her lapel. 
It's hard to see, so I don't have an detail for it. Anyone here lucky 
enough to see any of these costumes in real life?

The last question for now, is the name of the tartan she wears for an 
outer garment and hat at the quidditch match. I LOVE that hat! I 
cracked up when I saw those ear flaps! I'm dying to make this, 
especially. :)

If anyone is doing their own costume making, I'd love to hear what 
you're making, and I'll be happy to share my progress if anyone is 
interested.

Thanks for reading my post! :)

Nightengale Murphy