There ain't no such necklace. The quest is about remembering about that gifted little jeweler. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
I hated that quest for so many reasons. You fall in love with some random elf the first time you ever see them. There was almost no interaction with them at all. And then to complete the quest, you have to cheat them by counterfeiting their heirloom.
I wanted to skip that quest in every game. Often kept it till last. I didn't liked the male or the female npc's. Not ppl I wanted to see my char. get involved with.