The effect of the Great Rings upon Men

[Morthoron]

Originally Posted by Inziladun

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.

Tolkien in a discussion regarding the Rings of Power in general, states the following regarding the Three:

Originally Posted by Letter 131 to Milton Waldman, 1951

The Elves of Eregion made Three supremely beautiful and powerful rings, almost solely of their own imagination, and directed to the preservation of beauty: they did not confer invisibility.

The emphasis above is mine. There are obvious differences in the Rings of Power themselves and how they effect the wearer, and even how they effect what race is wearing them. Dwarves, being the stuff of the earth and indomitable, did not vanish, and, based on genealogical charts, do not seem to have excessive longevity.

Mortal Men (and Hobbits), however, exhibit all the signs Gandalf warned about. Frodo had the One Ring, and the Nazgul were under the power of the Nine and wanted to kill Frodo. No other Rings (the Seven or the Three) mattered. So why would Gandalf confuse Frodo with provisos, quid pro quos, caveat emptors and various other Latin phrases that may or may not have anything to do with what Gandalf was talking about and what he needed to impress upon Frodo so that the Hobbit could achieve his mission?