Diatom Arrangement is drawn from the lost Victorian craft of mounting single-celled algae — their glass-like silica shells, or frustules — into perfectly symmetric rosettes on a single microscope slide. Under dark-field illumination the ground is a true black void and the valves glow from within, their finely spaced pores acting as a diffraction grating that throws off structural iridescence in cyan, Prussian blue, mint, and the occasional gold.

This system inherits that logic exactly: a near-black field, radially mirror-symmetric jewel-like compositions, and refined period scientific serifs. Forms are luminous on black, spaced with mathematical precision, and framed by thin concentric rings — never flat clip-art, never the white ground of bright-field microscopy.