The picture above illustrates some of the materials we work with in generating images. These include minerals such as agate, quartz, fluorite, orbicular jasper and Paesina Stone; fossils such as ammonites and marine conglomerates; geological 'thin sections' (generally scanned using polarised light); and richly patinated surfaces such as Roman glass. We also create sources by manipulating paints and harnessing chemical reactions and biological processes.