Bumping this old thread.
I started leveling up Jewelcrafting on my chanter today, and I noticed that after I hit 28 and started making enchanted silver jasper rings, they were already trivial.
The trivial should be 30 according to
http://web.archive.org/web/200104171...p?tradeskill=4
http://web.archive.org/web/200011192...l_trivials.asp