北海道黑矽石圓珠 8mm 半串或一串（約15英吋/37公分）
其他石材
尺寸：約 8mm（+/-0.5mm）孔徑：約 1mm
顏色：黑色
由於寶石的天然來源，可能存在瑕疵和不規則形狀。
這些是來自北海道的圓形黑矽石珠。黑矽石即使在室溫下也具有廣泛發射遠紅外線的特性。因此，據說它具有緩解寒冷和肩膀僵硬、促進排汗、活化循環等健康益處，並用於溫泉旅館和岩盤浴。對不同尺寸的任意珠子進行化學分析，證實黑矽石的主要成分二氧化矽（SiO2）含量為76%。結果表可「在此」查看。
[*圖片中使用的網格為 1 公分 x 1 公分。]
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