What kind of chain is this?

[shani]

So I'm watching the first season of Weeds, and in one scene, the chain holding this character's silver locket catches my eye:

Isn't that a nice combination? I'd like to copy the idea. Could anyone give me information -- key words and such -- about the chain that I could use to describe it to a sales associate? A picture of this style of chain would also be helpful.

Thank you!

 

[TheImportersWife]

I'd consider it a Toggle Clasp Chain. I can't make out the actual type of chain from the picture though.