...what you could call Aedric artifacts?

I'd say so, yes.

Each piece has been blessed by at least one of the nine divines.

Yup, they are holy objects created by the Aedra. There are possibly more Aedric artifacts out there like the paint brush Dibella gave to a war veteran.

Some other notable ones are the Staff of Magnus, Auriel's bow, his shield, Stendarr's Hammer, Lord's Mail and of course, the Amulet of Kings!

Magnus is a Magne-ge, not an aedroth.

Being specific: he is revered by the Altmer, and thus is most likely considered an "Ancestor" - i.e., an Aedra (a term originating in Aldmeri culture; arguably misapplied in Imperial culture). His "ancestral line" is ideological, in his legacy rather than by physical descendents. I'm guessing that to Altmer, this distinction is sometimes a fuzzy one. You could maybe accuse me of splitting hairs here.

Magnus is obviously not one of the Imperial "Divines", though. He's also not a Magne-Ge in my books, as they are the "get of Magnus" - the spirits who followed in the Breaking, not Magnus himself.

Also, on the Amulet of Kings: that depends who you believe... did the Ayleids make it, or Shezarr, or Akatosh, or the Alessians themselves, with the ambiguous divine component a later complication?

The Amulet was probably a holy Ayleid artifact that Shezarr/akatosh blessed for Alessia. Not all the Daedric artifacts were created by the Prince they are associated with so the same could apply to the Aedric artifacts.

I know ESO throws in the possibility of the Amulet of Kings being made when Lorkhan's blood fell into an Ayleid well or something.

But yeah they are Aedric artifacts I guess, though I'm sure they don't have the same relationship that a Daedra has with his artifact. Speaking of, I just found out that Auriel's Bow in Skyrim is considered a Daedric artifact.. que?

Where did you find that?

Which part?

Auriel's Bow being Daedric was, IIRC, a dev mis-speak. Especially since "Daedric" and "the Aedric" are phonetically very similar.

The Ayleid wells bit.

The Amulet of Kings was literally the Slave Queen's blood, if only because it's not mentioned until she rebel's (and wins Cyrod) is given to her by Akatosh to signify Covenant. It was an idea to the Ayleids, perhaps. Only manifest through Alessia

Counts as a Daedric artifact in-game too.

I forget. I think it's in a book.

Perhaps. We know her soul is in there eventually.

I meant both parts because both sound equally weird. If the Amulet was Lorkhan's blood it would look more like ebony instead of a bright red jewel.

Unless it was freshly and magically preserved within a magical Ayleid well.

Not that I subscribe to the theory personally, but it's nice to have some new takes.

Just to help and maybe clear out some confusion. Lorkhan blood part seems to come from ESO bard song red diamond. There are lyrics of it on UESP