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.

[3][4] Widely regarded as Australia's greatest pop group of the mid-1960s, The Easybeats had their beginnings in Sydney's Villawood Migrant Hostel.

He was joined by fellow Dutchman Johannes van den Berg (known as Harry Vanda) on lead guitar and vocals, George Young from Scotland on guitar and vocals, and two Englishmen: lead singer Stevie Wright (Yorkshire) and drummer Snowy Fleet (Liverpool).

"[2] In September 1986, Diamonde participated in a reunion of the Easybeats for a series of concerts touring Australian capitals in the following two months.

[7][8] According to Stuart Coupe of The Canberra Times Diamonde had been "playing with a series of small-time bands up the north-east coast.