Dingeman Adriaan Henry van der Sluijs (Dutch pronunciation: [ˈdɪŋəˌmɑn ˈɑdriaːn ˈɦɛnri ˈvɑn dər ˈslœys]; 28 December 1947 – 18 September 2024), better known by his stage name Dick Diamonde, was an Australian bass guitarist. He was a founding mainstay member of the Easybeats. Diamonde, with the group, was inducted into the ARIA Hall of Fame in 2005.
