The tone is described as the author's approach or attitude towards a particular subject matter reflected by the language, perspective, or choice of words by the other. It primarily intends to give the readers a perspective that determines how they would perceive that particular literary text or writing.
In the given passage, the word 'precious' implies the author's intended perspective that he wishes to convey to the audience and that is 'the personal value' attached to the sword for Lord Corliss and his family. <em>It implies to 'stress the personal value' as the word 'precious' implies 'something dear or of extreme value' that suggests the author's attitude(to emphasize its worth). </em>
