title is self-explanatory, but with a better in-depth analysis, there are very few necklaces that are legendary (Especially since it is near to completely impossible to get a legendary gold ebon necklace for the ebon armoury set as with many other sets out there), but if jewellery crafting was implemented, then people might be able to do better with crafting unique set combinations & coming up with new possible meta's to use in eso.
but putting it honestly though: what are the chances of ZOS implementing Jewellery Crafting into ESOTU???
If you see me anywhere. Know that I am sitting back with a bag of popcorn, watching as ESO burns the goodwill of its player base with practices that only disrespects the players time like it did to me and many others...
If a game does not respect your time, best thing to do is move on from it and find something else.