This necklace was inspired by the following scene from "Harry Potter and the Methods of Rationality" by Eliezer Yudkowsky:
----------Within the room were pedestals of black metal, each bearing a moving picture, or an upright cylinder half-filled with some faintly shining silver liquid, or a lone small object; a scorched silver necklace, a crushed hat, an untouched golden wedding ring. Many pedestals bore all three, the moving picture and the silver liquid and the item. There seemed to be a good many wizards' wands upon those pedestals, and many of those wands were broken, or burned, or looked like the wood had somehow melted.
It took that long for Harry to realize what he was seeing, and then his throat suddenly choked; it was like the rage inside him had been hit a hammerblow, maybe the hardest hammerblow of his entire existence.
"These are not all the fallen of all my wars," Albus Dumbledore said. His back was to Harry, only his grey locks and yellowish robes showed. "Not even nearly all of them. Only my closest friends, and those who died of my worst decisions, there is something of them here. Those I regret most of all, this is their place."
From Memebase:It’s rare, but every once in a while, a decent fanfic rises from the endless sea of bad fanfiction to surprise and delight. This is one of those fanfics. In Harry Potter and the Methods of Rationality, Harry is raised by an Oxford professor as a Bayesian rationalist. All those moments in which you yelled “Harry, WHY? What are you doing, you stupid ****?” are no more!
Read it here: [link]
I know you're probably doubting me. It can't be THAT good, can it? Trust me. It's that good.