We don't have a method to include the regular icons C3 uses everywhere else in dropdown lists, we can only use text in each item. So in the case of dropdowns I decided to use an emogi, which is the next best thing.
This is the real emogi 🌍 being used, notice the colour. I found that you can force the rendering of the monochrome variant, which is this one 🌍︎. (You might not be seeing any difference depending on how you are viewing this post)
The problem with that is that is that it doesn't seem to work in OSX, I imagine it's the same in iOS.
Windows shows the monochrome variant, so it's something.
I'll have to try generating the emogi in a different way, maybe OSX and iOS only show it in a very specific way.