Tortoiseshell and Cat s Eye Optic Character
Tortoiseshell and Cat s Eye optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Tortoiseshell Vs Cat s Eye like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Tortoiseshell and Cat s Eye optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.