§ Of the Silmarils and the Unrest of the Noldor The Silmarillion

All who dwelt in Aman were filled with wonder and delight at the work of Fëanor. And Varda hallowed the Silmarils, so that thereafter no mortal flesh, nor hands unclean, nor anything of evil will might touch them, but it was scorched and withered; and Mandos foretold that the fates of Arda, earth, sea, and air, lay locked within them. The heart of Fëanor was fast bound to these things that he himself had made.