§ Of the Ruin of Doriath The Silmarillion

In that battle by Sarn Athrad Beren fought his last fight, and himself slew the Lord of Nogrod, and wrested from him the Necklace of the Dwarves; but he dying laid his curse upon all the treasure. Then Beren gazed in wonder on the selfsame jewel of Fëanor that he had cut from Morgoth's iron crown, now shining set amid gold and gems by the cunning of the Dwarves; and he washed it clean of blood in the waters of the river. And when all was finished the treasure of Doriath was drowned in the River Ascar, and from that time the river was named anew, Rathlóriel, the Goldenbed; but Beren took the Nauglamír and returned to Tol Galen. Little did it ease the grief of Lúthien to learn that the Lord of Nogrod was slain and many Dwarves beside; but it is said and sung that Lúthien wearing that necklace and that immortal jewel was the vision of greatest beauty and glory that has ever been outside the realm of Valinor; and for a little while the Land of the Dead that Live became like a vision of the land of the Valar, and no place has been since so fair, so fruitful, or so filled with light.