Object to Enjoy Crystal Changes The storm glass was a weather predictor commonly used in the 19th century by navigators and others in Europe. It was made by sealing camphor (extract of camphor tree) and ethanol in a glass tube, and was used to observe the crystals that formed in response to changes in the climate. With the subsequent development of science, it was found that there is still much mystery surrounding the crystallization phenomenon, and the details are still under research. Although it is difficult to use it practically as a predictor in modern times, please enjoy the appearance of the crystals that change daily, just as the scenery changes with the seasons. ✴️ The product will be packaged in the box at the time of purchase, but there are crayon scribbles on the surface of the outer box. ✴️ Although it has been stored in a dark place, the liquid is slightly yellowish. ❇️ The wooden base and the product itself are not problematic, and I think you can still use it. Retail Price: 6,820 yen (tax included) Size: (approx.) Width 11.5 x Height 20.5cm Materials: [Main body] Borosilicate glass, water, ethanol, natural camphor, ammonium chloride, potassium nitrate, [Base] Wood