Backscattered electron image (BSE) images of ocean island basalt samples from four volcanic systems in Iceland (Holuhraun, Skuggafjoll, Laki and Eyjafjallajokull) and two eruption sites on Pico Island in the Azores (samples PI-011 and PI-041). These samples are described in the following manuscript: Neave, David A., Alexander G. Stewart, Margaret E. Hartley, and Olivier Namur. ‘Iron Valence Systematics in Clinopyroxene Crystals from Ocean Island Basalts’. Contributions to Mineralogy and Petrology 179 (2024): 67. https://doi.org/10.1007/s00410-024-02144-x.