The effect of the Great Rings upon Men

[Inziladun]

Originally Posted by Morthoron

In any case, the three Elvish Rings of Power do not have the same issues as the Sauronic Rings of Power: the Elvish rings can be gifted freely and without resultant psychological/addictive problems, and they are held indefinitely by Elrond, Gandalf and Galadriel because, unlike the Sauronic Rings wanting to escape to their master (Sauron) and having the taint of the Dark Lord upon them, the Elvish Rings were created separately and for very different motives.

Agreed. Although the Three, being at least partially the product of Sauron's instruction, were subject to the One, they are clearly not in the same mold as the Seven and the Nine. The lack of invisibility of their wearers is a major indication of this.
I wouldn't think a mortal who had run across one of the Three would have been affected in the same way, either. The effect may have been similar to that seen by the Fellowship while in Lórien. They were not immortal, but for them biologically speaking, time slowed.

Back to the subject of the life-lengthening process of the other Rings, the fact that the Seven did not influence the Dwarven lifespan has always interested me. Because of their very nature they could not be turned to wraiths either. Did the Dwarven keepers become invisible while wearing their rings? I would think not, because the invisibility, life-lengthening, and wraith-potential all seem intertwined.