Beitou stone from negative ion inner diameter 21cm [GOLD STONE] bracelet, 12mm, orange, Taiwan, measured, radium, hokutolite, approx.

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Grain diameter: 12mm (±0.5mm) Inner diameter: 21cm *The photo shows a product with an inner diameter of 16.5cm. High-performance Beitou stone that produces higher negative ion values than regular Beitou stone Beitouite is a natural monument in both Taiwan and Japan, and no new stones are produced. This product is made by baking powder of Beitouite that was produced in Taiwan before mining was banned into ceramics. Color can be added by mixing soil or other materials into the ceramic when it is baked. This is a new product that has succeeded in producing an orange color by fine-tuning the ingredients of the Beitouite powder when mixing it. High-performance hokutolite that produces higher negative ion counts than regular hokutolite [Hokutolite from Taiwan] Beitou stone is a natural monument in both Taiwan and Japan, and no new stones are produced. Therefore, powdered Beitou stone is baked into ceramic (pottery). Color can be added by mixing soil. This product is a new product that has succeeded in coloring the Beitou stone orange by finely adjusting the powder ingredients when kneading and mixing the powder. When measuring the negative ion value with an ion tester, the value can be measured to be more than double that of normal colors.