Emerald Closure

Hi all,

I recently made a pouch for a friend, and used a simple stud closure:

They’ve asked if I would make another, but using an emerald/onyx closure. Is anyone aware of such an item being sold, anywhere?

They also suggested that I might use an earring or a tuxedo stud as a closure. Something like these:

I love the idea, but I’m unsure as to how it’d be secured.

Does anyone have any thoughts on this? I’d be most grateful for your advice.

Thanks!!