Silmaril

The Oath was blasphemous. It defied the authority of the Valar. It justified murder, betrayal, and civil war. The Silmarils thus became "hallowed but accursed." They inspired such overwhelming desire that Fëanor led the Noldor into rebellion, slaughtered their Elven kin (the Teleri) to steal their ships, and abandoned Valinor to wage a hopeless war against Morgoth. The light of the Silmarils promised heaven, but the Oath to reclaim them led to the Elves' version of the Fall.

The history of the Silmarils is not a static possession; it is a relay race of tragedy. Here is how each jewel fared: silmaril

Tolkien describes them as appearing to be diamonds "but stronger than adamant." Their beauty was unnatural in its perfection; they glowed with their own internal, holy light—the light of creation before the Sun and Moon. Whoever looked upon a Silmaril saw not just a jewel, but the literal, distilled purity of a lost paradise. Crucially, once the Two Trees were destroyed by the dark god Melkor (Morgoth), the Silmarils became irreplaceable. They contained the last remnants of the original light of the world. The Oath was blasphemous

Despite countless battles, heroic sacrifices, and the establishment of mighty realms like Gondolin and Nargothrond, the Elves could not breach Angband. The Oath of Feanor continually poisoned their alliances. It led to the Kinslayings—instances where Elf slaughtered Elf for the sake of the jewels. The tragedy of the Silmarils lay in their ability to turn the noblest intentions into acts of horrific cruelty. The Tale of Beren and Lúthien The Silmarils thus became "hallowed but accursed