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the fourth stone
not just the idea of it
In Argentina the stone has carried the name "Incan Rose" for generations of miners and traders
The resulting banding—alternating pink and cream—records variations in manganese concentration and fluid chemistry across those slow growth cycles
Each piece is handcrafted in the USA
Blue Kyanite Sterling Silver Ring Black Tourmaline the fourth stoneA 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