SCIENCE Mini Mineral Specimen Bi Made in in a thumbnail box 4cm "Bismuth (Artificial Crystal) Germany" (approx. square)

---------------------------------------------------------------------- 【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. ---------------------------------------------------------------------- The iridescent colors on the surface are due to an oxide film formed by a reaction with oxygen during recrystallization. Bismuth (artificial crystal) Chemical formula: Bi Made in Germany Thumbnail box Specimen case size: 39 × 39 × H34 mm *Please note that the image may differ in appearance from the actual product due to lighting conditions. *The contents and origin of ingredients may change due to availability. Specimen Case: This approximately 4cm square plastic case is called a thumbnail box, a popular method of storing specimens in countries where mineral collecting is popular. Even if you collect many specimens, they can be stored in a small space and can also be displayed as interior decor. Bismuth is known in Japanese as "sōen." This crystal is formed by melting bismuth with heat and then recrystallizing it, resulting in a shape called a skeletal crystal, which resembles a truncated square pyramid. The iridescent color on the surface is due to an oxide film formed by the reaction with oxygen during recrystallization. *Contents and origin may change depending on the availability of materials.