Rings of Power talk!

[Pervinca Took]

I've never read anything that suggests any of the rings aside from the One Ring had the ability to grant invisibility to its wearer. This is a trait unique to Sauron's ring.

Gandalf: "A mortal, Frodo, who keeps one of the Rings of Power, does not die, but neither does he grow or obtain more life ... and if he often uses it to become invisible, he fades; he becomes in the end permanently invisible ...."

I think they conferred invisibility, but to mortals only.

I think there was a discussion on the LOTR Plaza a while ago to the effect that the invisibility factor was possibly a mere by-product/unintended additional effect of the production of the rings, not a specific purpose in design.