Handmade silver collar, hammered for texture and shape.
The hinges in front also serves as the lock, with a small pin that is pulled upwards to release, but is kept from falling out by a small piece of silver wire going through it.
This makes it very nice to wear with your hair put up, as it has a clean chain in the back, no lock showing.
It's pretty heavy, but doesn't feel like it because it rests on the collarbones.
It's made of 925 silver.