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Sold and shipped by Japanese sellers
* Operated by Japanese sellers - Japanese sellers with trust and experience.
* Direct from Japan - All items are carefully packed and shipped promptly from Japan.
* Highest quality control - Inspected by Japanese standards to ensure high quality products.
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◆Size Diameter 10mm (0.5mm) Inner diameter approximately 150mm (±5mm)
It is produced in the Itoigawa region of Niigata Prefecture and parts of Toyama Prefecture.
Rhyolite, a type of volcanic rock, also emits trace amounts of radiation as radium ore.
Because it emits low doses of natural radiation, it has recently attracted attention as a stone that can be expected to have a hormesis effect.
Because we process natural raw stones, there may be dents or scratches on the grains. Thank you for your understanding in advance.