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Common Inclusions Found in Achroite Gemstone Achroite, a colorless variety of tourmaline, can occasionally display a cat’s eye effect due to needle-like inclusions that create a luminous band resembling a cat’s eye. These inclusions can add a unique visual appeal to the gemstone. Possible Colors of the Achroite Gemstone Achroite is primarily colorless, but it can also exhibit a blue hue. The...