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Tourmaline has many color variations. Do effects vary depending on the color?

Q.18 Tourmaline has many color variations. Do effects vary depending on the color?
It is said that the performance of tourmaline as "Electronic Stone" is not determined by the color but by the hardness of the tourmaline stone and the length of the growth line of the crystal.
 
Author: Masaharu Nemoto
(Universal Plan Co., Ltd.)
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Polished Tourmaline Stones (1kg) (Tourmaline Stones)

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Polished Tourmaline Stones (1kg)
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