Color change sapphire and Alexandrite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Color change sapphire and Alexandrite Physical Properties 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 Color change sapphire and Alexandrite 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. Alexandrite has Biaxial/+ character.
Similar to their colors, Color change sapphire and Alexandrite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Color change sapphire is Not Available while Color change sapphire is Not Available in appearance.