Let's Talk About The Rod

In reviewing the photos in the previous post, I got to thinking about the rod. I'm convinced it is some type of translucent, amber looking thing with different colors in it. Like it tortoise shell rod or something like that.

Take a look at this picture:



I'm thinking one of the arms of a pair of glasses like this would be perfect. Of course, it would need to be round, not squared, but you get the idea.

I haven't had any luck finding rod like this on sale anywhere on the net. Any ideas?