Hokutolite Tea Necklace Color: Brown Size: 6.0mm - 6.4mm, 69 beads 41cm + 5cm adjuster, total length 47cm Actual product shown in the image. Image of the product measured with a Geiger counter, made in Japan. Hokutolite is a product fired from ceramic. The black spots are said to be radium ore. Hokutolite is a lead-containing barium sulfate (lead-containing barite) found only in the Beitou Hot Springs in Taiwan and the Tamagawa Hot Springs in Akita Prefecture, Japan, and is thought to be formed by the sedimentation of deposits from the hot spring source. In 1898, geologist Hirozaburo Sakurai discovered it at Tamagawa Hot Springs in Akita, and in 1907, Yohachiro Okamoto discovered a similar stone at Beitou Hot Springs in Taiwan, and it was named Hokutolite. Tamagawa Hot Springs is said to have been discovered long ago by local Matagi hunters. It was called "Deer's Hot Spring" because deer were healing their wounds in the hot spring, and its name quickly became known as a therapeutic spa due to its high efficacy (※At the time of the discovery of Hokutolite, it was called Shibiguro Hot Spring, later becoming Tamagawa Hot Spring). The spring quality is a radium hot spring with radioactivity, and Hokutolite also has a small amount of radiation and is said to emit radium emanation (radon). This radon is said to have the effect of activating cells, and Hokutolite is called a "medicinal stone." Hokutolite was designated as a natural cultural landscape in Taiwan in 2000, and as a natural monument in Japan in 1922, and as a special cultural property in 1952. Therefore, the mining of Hokutolite is currently prohibited in Japan, and all products in circulation are from Taiwan. #BeitouHotSprings #Hokutolite #Taiwan #Ceramic #Beauty #BeautifulSkin #Healing #BoostImmunity #WasteRemoval #IncreaseMetabolism #Cells #Vitality #DreamyGlow