Tourmaline Cat's-eye, The Sparkling Birthstone for October 10th
Birthstone for October 10th: Tourmaline Cat’s-eye Description of Tourmaline Cat’s-eye Tourmaline Cat’s-eye is a fascinating and unique variety of tourmaline that features a rare optical effect called chatoyancy. This phenomenon creates a striking, luminous band of light that appears to glide across the surface of the gemstone, resembling the slit-like pupil of a cat’s eye. The effect is most pronounced in cabochon-cut stones, which enhance the gemstone’s natural beauty and mystique....