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 variety of radium products, including Bad Gastein stone and Himekawa medicinal stone. 【Specifications】 Bead Size: Approximately 10mm Total Length: Approximately 55cm Clasp: Silver insert bean clasp *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 k18 pull ring plate → +8,000 yen 【Radiation Level】 Approximately 25-35μsv (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. *Although the price is low, it is a genuine product that has been imported in large quantities through official channels, so please rest assured. 【Taiwanese Hokutolite】 A precious stone that 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. Hokutolite contains radium, and due to the hormesis effect, it is said to be a "doctor-free" stone that is good for health. Hokutolite commonly sold as round beads is processed from Hokutolite powder and small pieces with ceramic, but this does not affect the stone's effectiveness. *Notes before purchase* ※We try to photograph the photos in colors that are as close to the actual product as possible, but the colors may appear different depending on your monitor or smartphone. ------------------------------------------------ #Naturalstone工房北投石 Click here for a list of other Hokutolite products on sale ------------------------------------------------