Embellished Collars and DIY

There's a lot of 'How to DIY an embellished collar' tutorials - just google it!!
diy: metallic collar button up - Because I'm Addicted
DIY accessory: Peter Pan embellished lace collar - Style Guru

Hailee Steinfeld in Miu Miu
Embellished Collar and Sleeve Dress by Marchesa
Katy Perry

There are other options:

Antique embellished collar at Topshop

Premium Statement Neck Collar With Etched Imagery at ASOS

FALCONIERE Shaker Collar brass necklace at Net-a-Porter