"Acestea sunt inelele mamelor."

[alur_blaze]

Do the rings have to be articulated? Or, more broadly, when a noun has a genitive/dative noun responding to it, does it have to be articulated?

[efalc]

I learned that with the (possessive) genitive, yes, the noun must have the "definite" article. Think of it as a reinforcement that they are not just any rings, or rings in general, but specifically those that belong to the mothers.

[LICA98]

what's wrong with "these are the moms' rings"