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4.4kg Black Silica Raw Stone from Kaminokuni Town, Hokkaido

โ˜…โ˜…โ˜…โ˜…โ˜… 4.5 rating ยท 26 reviews ยท 257+ sold
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Product Details

Black Silica Raw Stone from Kaminokuni Town, Hokkaido

We also have Black Silica available as an addition to our bath sets.

โ–  Product Weight: Approx. 4.4 kg
โ–  Product Size: Height approx. 200mm, Width approx. 160mm, Thickness approx. 120mm

[Black Silica (Graphite Quartzite)]
Black Silica is a mineral formed by the mixture of graphite and quartzite, and it is a highly rare mineral found only in the upper reaches of the Amagawa River in the Shinmei district of Kaminokuni Town, Hokkaido, the only place in the world.

Recently, high-quality Black Silica has become difficult to obtain, but we have acquired a good quality batch.

When added to a bath, it provides a warming effect, and adding Terahertz further enhances the hot spring experience.
Adding 2kg is ideal.
You can also break it down to make silica water, so please feel free to ask questions after your purchase.

There is also Black Silica for agricultural fertilizer, which may be oxidized. Therefore, even if you already have Black Silica, please do not mix it and use it separately.

#BlackSilica
#HokkaidoKaminokuniTown

Category
Bath Warmers
Condition
New/unused
Shipping
Included in price (by seller)
From
Kanagawa

Daily Cleaning: Use a soft brush or damp cloth to gently wipe away dirt. Avoid harsh chemicals. For mesh areas, use diluted mild detergent and a soft brush.

Drying: Air dry in a cool, shaded place after cleaning. Avoid direct sunlight or high heat, which can cause fading and glue deterioration.

Storage: Stuff with paper to maintain shape when not in use. Store in a dry, ventilated area to prevent mold. Rotate between multiple pairs to extend lifespan.

Usage Notes: Designed for basketball. Not recommended for hiking, long-distance running, or other specialized sports where different performance features are required.

Customer Reviews (26)

4.5
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Based on 326 reviews
5 stars
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4 stars
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M
User6708688
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2026-11-11

Nicely finished and durable construction.