Gwyneth Jones (born February 14, 1952) is a British children's writer (as Ann Halam) and, under her own name, a science fiction and fantasy writer and a critic.

Dame Gwyneth Jones DBE (born November 7, 1936 in Pontnewynydd, Wales) is a Welsh soprano.

Dame Gwyneth studied music at the Royal College of Music, London, the Accademia Musicale Chigiana in Siena as well as the International Opera Studio in Zürich. After making her professional debut in 1962 as a mezzo-soprano in Gluck's opera Orfeo ed Euridice, she was engaged by the Zurich Opera House. She soon discovered that her easy top range could enable her to sing soprano roles and she switched to the soprano repertoire from around 1964, her first major soprano role being Amelia in Verdi's Un ballo in maschera.

"Castles Made of Sand" is a song from The Jimi Hendrix Experience's second studio album, Axis: Bold As Love, released in 1967 in the UK and 1968 in the U.S. It was available in two different stereo mixes and a mono mix.