Nimphelos was the greatest of the pearls that Thingol gave to the Dwarves of Belegost in payment for their service in the building of Menegroth. Pearls were especially valuable to the Dwarves as they were not fond of the sea and had no means of acquiring them except through trade. Nimphelos was said to have been the size of a dove's egg. It was originally given to Thingol by Círdan the shipwright. It was found by the Falathrim of the Isle of Balar.