Treble clef is used for the soprano, mezzo-soprano, alto, contralto and tenor voices. Stone possesses the vocal range of a mezzo-soprano and contralto. Her vocal range was labelled as a mezzo-soprano and a contralto. The vocal range of the mezzo-sopranos lies between the soprano and the contralto voice types. The mezzo-soprano voice resonates in a higher range than that of a contralto. Women are typically divided into three groups&colon; soprano, mezzo-soprano, and contralto. Women are typically divided into three main groups&colon; soprano, mezzo-soprano, and contralto. Another example was Pauline Viardot, who alternated roles of soprano and contralto. The contralto voice type is generally divided into the coloratura, lyric, and dramatic contralto. Yuro possessed a contralto vocal range. Harvey possesses an expansive contralto vocal range. She has a sultry, vibrant contralto voice. Reid is also known for her expansive vocal range and emotive contralto voice. Keys has a three octave contralto vocal range. Welch has a contralto vocal range.