There are many types of rings that people wear, some of them have no gem or stone studded in it. The ring with a gem is called 'gem-studded' if we emphasize on the presence of a gem in it, but what about the one which has no gem in it, like the one in the image?
Can we call it a 'gemless' ring?
Actually the culture I belong to, we have two different names for the two rings [one with gem, and the one without gem.] I need to make an adjective, so that I can use it in a noun phrase like this:
She usually wears a gem-studded ring, but today she is wearing a gemless ring.
Does it sound ok? Does it make the meaning clear that the focus is on the presence and absence of a gem in a ring? Although I know that in English it is simply 'a ring' whether it has a gem, or not