Aegnor was an associate of Celebrimbor since their years together in Nargothrond, and though not the most adept at delicate operations, he was a master of fires and furnaces. A Lord Forger, he supervised all smelting operations at the Mirdaithrond ("Halls of the Jewel-smiths") in Ost-in-Edhil. In fact, he designed most of the forges and smelting facilities. Although generally a good-natured and patient man, he had no time for Annatar, the "Lord of Gifts," and never shared his most powerful forging secrets.
An impressive figure, Aegnor was 6'10" tall, and very strong of build. His hair was dark brown, and his eyes so dark blue as to be almost violet.