The Lock of Nymph's hair can be sold to the owner of Sorcerous Sundries for 500, or can be fashioned into a Nymph Cloak by him for 100. It can also be sold to other merchants, but only for 250. It is gained when you help the nymph Abela out of the claws of one of the two rivalling mages in Baldur's Gate. This item appears in Baldur's Gate and Baldur's Gate: Enhanced Edition.
Sometimes in BG:EE, Abela gives the PC a Nymph Cloak with 0 charges instead of the lock.
|“||While nymph's hair has no magical properties of its own, it is an important component in a variety of charisma-related spells spells and items, not the least of which is the fabled Nymph's Cloak.||”|