Silmarils
The Silmarils (Quenya in-universe pl. Silmarilli [sil.maˈril.li], lit. 'radiance of pure light') are three fictional brilliant jewels in J. R. R. Tolkien's legendarium, made by the Elf Fëanor, capturing the pure light of the Two Trees of Valinor. The Silmarils play a central role in Tolkien's book The Silmarillion, which tells of the creation of Eä (the universe) and the beginning of Elves, Dwarves and Men.