So what is the significance of this necklace showing up again? Since Littlefinger confessed his love for Sansa to Jon Snow in this week's episode, and since Sansa eyed him right after her brother's speech about leaving Winterfell, the necklace could mean that she will once again form some kind of alliance (romantic or otherwise) with Petyr Baelish. Or, perhaps because of this necklace's connections to death, it could mean that Sansa may soon be driven to kill Littlefinger while she's holding down the fort in Winterfell. Knowing Game of Thrones, it could go either way. Or, it could very well go in a direction we never saw coming.