How to tell if vintage sterling is rhodium plated?

[iyiyi]

New here. Sorry if this isn't the right forum.
I have some vintage sterling ID bracelets that are very shiny. I only recently learned about rhodium coating. Is there a way to tell if sterling is Rhodium plated? I can't seem to find any solid information about this online. I appreciate any input!

 

[Tourmaline]

Unplated silver tarnishes or gets dull if exposed to humidity (and can be polished with a cloth), and rhodium plated silver stays bright until the plating wears off.