 She won the award “Best Female Artist of Zimbabwe” three times.Colleen worked predominantly in Springstone (a local type of hard serpentine rock much used by Zimbabwean sculptors), but also used Opal stone (a softer variety of serpentine), for example for her major work “The Birth”, now part of the Chapungu permanent collection.She used both rough and polished stone in her sculpture, often leaving parts of the surface of the stone in its raw oxidized form to provide color for hair or clothes, while creating expressive faces, arms and hands in the fully polished black stone.