Museum catalogue photograph of a sky mirror from a civilisation that never existed: a round disc of polished black obsidian the size of a dinner plate, set in a frame of carved dark wood, its glossy face finely scratched with a grid of fine lines and a few tiny drilled dots, as if used to track the positions of stars reflected in it. The polished surface reflects only the grey studio. Small chips around the edge of the stone. Displayed upright on a museum stand. Neutral grey seamless background, raking light from the left, a black-and-white scale bar and a small accession card beside the object with no legible writing on it. Archaeological museum catalogue documentation style. No readable text, no letters, no numbers, no logos.