... a single piece of jewelry from Skyrim, what would it be?

A pendant of the Skyrim (Imperial) Dragon?
An Amulet of Talos?
A Silver & Moonstone circlet?
A ring?
The Saarthal Amulet?
Something else?

Powers & perks aren't a consideration here. Only your personal, subjective aesthetic on the one piece you'd have if you could.

I think I'd like the Bone Hawk Amulet or the Jade & Emerald Circlet.

http://www.uesp.net/wiki/File:SR-icon-jewelry-Amulet_of_the_Elder_Council.png