The Gemara Shabbath (several pages, but look anywhere from 59a through at least 62a for several discussions) contains a great deal of discussion about wearing "Tachshitim" (ornaments/jewelry) on Shabbath and whether or not it is considered carrying outside.
I think I must have missed something, though. About half the time that the Gemara concludes that something is a Tachshit, it says it is therefore totally fine for someone to wear outside on Shabbath, but the other half of the time the Gemara concludes that something is a Tachshit, it concludes that it is therefore forbidden for someone to wear it outside on Shabbath.
Which is it? Is it permissible or forbidden to wear a Tachshit on Shabbath?
This question is part of the Daf Yomi Challenge.