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

Thus ere the Valar were aware, the peace of Valinor was poisoned. The Noldor began to murmur against them, and many became filled with pride, forgetting how much of what they had and knew came to them in gift from the Valar. Fiercest burned the new flame of desire for freedom and wider realms in the eager heart of Fëanor; and Melkor laughed in his secrecy, for to that mark his lies had been addressed, hating Fëanor above all, and lusting ever for the Silmarils. But these he was not suffered to approach; for though at great feasts Fëanor would wear them, blazing on his brow, at other times they were guarded close, locked in the deep chambers of his hoard in Tirion. For Fëanor began to love the Silmarils with a greedy love, and grudged the sight of them to all save to his father and his seven sons; he seldom remembered now that the light within them was not his own.