T'was the light of the Trees that shone in Fëanor's jewels, you kin-slaying ship-burning maniacs, not his own, and his hubris that brought Morgoth and his spider to the Undying Lands and darkened them.
Cursed are the Ñoldor for their ill deeds, and twice cursed the sons of Fëanor and anyone who swears his oath, which only brought darkness and suffering upon Arda!