Somewhere beneath Saturn's golden bands, lightning tears apart methane and sends carbon drifting downward through crushing pressures — and scientists have long wondered whether that descent ends in diamonds. The idea is not fantasy; it is grounded in Cassini's real observations of dark storm clouds and the known physics of carbon under pressure. Yet between a plausible inference and a confirmed phenomenon lies a vast interior that no instrument has ever reached, and the celebrated figure of a thousand tons of diamonds per year is less a measurement than a meditation on what might be.