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Mohs 5 to 6
In Argentina the stone has carried the name "Incan Rose" for generations of miners and traders
and a genuinely piezoelectric and pyroelectric mineral: it generates an electric charge under mechanical pressure and temperature change
the fourth stone
The pairing spans the upper half of the chakra spectrum
Blue Kyanite Sterling Silver Ring Black Tourmaline Mohs 5 to 6A blade of blue caught in silverthe mineral's natural striations visible through the stone. Blue Kyanite is an aluminum silicate, chemical formula Al2SiO5, with a distinctive anisotropic hardness: Mohs 4. 5 along the long axis, Mohs 6. 5 across itwhich is why lapidaries work it with such care. Its color ranges from pale sky to deep sapphire, concentrated in parallel striated bands that run the length of each blade shaped crystal. This faceted stone is
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