Taiwanese High Purity Hokutolite Necklace Measured for Negative Ions and Radiation *Each piece is carefully handcrafted by professional artisans. The wire uses a flexible and firm thick stainless steel wire. We also carry a wide selection of radium products, including Bad Gastein stone and Himekawa medicinal stone. 【Specifications】 Bead Size: Approximately 8mm Total Length: Approximately 52cm Clasp: Silver925 hook and plate *Length adjustment available We will provide a new estimate, so please let us know your desired length in the comments. *Hardware changes available ・Change to brass button clasp → Free ・Silver925 hook and adjuster → +500 yen ・Silver925 insert bean clasp → +2,000 yen ・K18 hook and plate → +5,000 yen 【Radiation Level】 20-25μsv (Please note that the radiation level is not constant due to the natural mineral.) *This yellow-gray type is a special high-purity version. It detects 3-5 times more negative ions compared to the commonly available white type. 【Taiwanese Hokutolite】 This precious stone exists only in two places: Beitou Hot Spring in Taiwan and Tamagawa Hot Spring in Akita Prefecture, Japan. In Japan, it was designated as a natural monument in 1922 and a special natural monument in 1952, and mining is now prohibited. This product is Hokutolite purchased from a Taiwanese company that has a factory that processes the raw stone. It is said to be effective for promoting health by emitting radiation due to its radium content. Because Hokutolite contains radium, it is said to be a "doctor-free" stone that is good for health due to the hormesis effect. Hokutolite commonly sold as round beads is made by processing Hokutolite powder/small pieces with ceramic, but this does not affect the stone's effectiveness. *Notes before purchase* ※We try to photograph the colors as close to the actual product as possible, but the colors may appear different depending on your monitor or smartphone. ------------------------------------------------ #NaturalstoneKoboHokutolite Click here for a list of other Hokutolite products on sale ------------------------------------------------