Purchased from a Japanese MOMA shop over a decade ago. The shape of the crystals changes with the weather. Storm glass, used by navigators and others as a weather forecasting device on 19th-century voyages. Tempo Drop is a glass container sealed with several chemicals, including camphor (extract of camphor tree) and ethanol. If the solid components in the glass settle to the bottom and the liquid becomes clear, it will be sunny. If the sediment increases and star-shaped crystals float in the solution, it will rain. If some of the solid components form large leaf shapes on the surface of the solution, a storm is coming... For example, such changes were observed, but with the advancement of science, many mysteries have also been revealed. Installed on the Nautilus, which appears in Jules Verne's novel "Twenty Thousand Leagues Under the Sea," enjoy the crystals that change shape with daily weather changes like natural art. Depending on the environment where it is placed, the camphor will gradually change to an amber color over time. Discoloration does not degrade crystallization. Slightly amber-colored. It's old. It was 6000 yen. Without the original box, 2000 yen.