The three Silmarils were jewels created by Fëanor, most gifted of the Elves. Within them was imprisoned the Light of the Two Trees of Valinor before the Trees themselves were destroyed by Morgoth, the first Dark Lord.
Thereafter, the unsullied Light of Valinor lived on only in the Silmarils, but they were seized by Morgoth and set in his crown, which was guarded in the impenetrable fortress of Angband in the north of Middle-earth.
The Silmarillion is the history of the rebellion of Fëanor and his kindred against the gods, their exile from Valinor and return to Middle-earth, and their war, hopeless despite all their heroism, against the great Enemy.
IntroAinulindalë 1Ainulindalë 2Valaquenta 1Valaquenta 2Of the Beginning of Days 1Of the Beginning of Days 2Of Aulë and YavannaOf the Coming of the Elves, Captivity of Melkor 1Of the Coming of the Elves, Captivity of Melkor 2Of Thingol and MelianOf EldamarOf Fëanor and the Unchaining of MelkorOf the SilmarilsOf the Darkening of ValinorOf the Flight of the Nolder 1Of the Flight of the Noldor 2Of the Flight of the Nolder 3Of the Sindar 1Of the Sindar 2Of the Sun and the MoonOf Men 🙄Return of the Nolder 1Return of the Noldor 2Of Beleriand and Its RealmsOf Maeglin 1Of Maeglin 2Of the Coming of Men into the West 1Of the Coming of Men into the West 2Of the Fall of BeleriandOf the Fall of Beleriand 2Of the Fall of Beleriand 3