Other Stones , Round

Size: Approx 16mm (+/-0.5mm)
Hole size: Approx 1mm
Color: Black

These are Round beads of Hokkaido Black Silica.
Black Silica has the characteristic of emitting far-infrared rays over a wide range even at "room temperature".
Therefore, it is said to have health benefits such as alleviating cold sensitivity and stiff shoulders, promoting perspiration, and activating circulation, and is used in hot spring inns and bedrock baths.
A random piece of a different size from this product has been analyzed for its components, and 76% silicon dioxide (SiO2), the main component of Black Silica, was confirmed.
The analysis results can be viewed "here".
Selling by pieces to make it easier to purchase.

[*The grid used in the image is 1cm x 1cm.]