A jewelry clasp for use with a jewelry band including a base piece having an open passage at one side thereof; an insert piece having an attachment end and an insert end; a first magnetic member disposed at a bottom of the open passage; and a second magnetic member disposed at a free end of the insert end of the insert piece. The insert piece has an insert position in which the insert end is free to extend into and out of the open passage, and a locked position in which the insert piece is secured with the base piece by relative rotation.