I'd look into making one personally. Or convincing your master to make one. I means more that way, and you can get pretty creative with them. I made one ages ago for a friend's sub from chainmaille that just looked like a typical choker. Perhaps something like that would work?

My prior partner purchased me a collar that was sculpted to look like a very ornate necklace, made by a specialty jeweler so that I could wear it wherever I chose to; his was a thick leather collar that was still passable as a hipster necklace.

Each of them was custom made, so you may wish to reach out to a local jeweler to see what tickles your fancy.

I would love to wear something from my owner everyday. It would make me much closer to her. I will have to bring it up with her tonight.

I've seen a few I liked, and I'll have to link them when I'm a tad more lucid. A lot of steal, locking jewelry type collars that could pass as a necklace.

Nothing's really suited me yet though, I'm liking all the suggestions
C: