1800 W. Saunders iv. 158 This..is found to be composed of siliceous earth, interspersed with metallic looking spots.
1874 A. B. Garrod & E. B. Baxter (ed. 4) 56 It occurs in crystalline metallic-looking powder of a steel-grey colour.
1994 Apr. 76/1 Metallic-looking plankton added a golden patina to the shallow, slowly moving water.