White topaz and Apophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the White topaz and Apophyllite 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 White topaz and Apophyllite 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. Apophyllite has Uniaxial/- character.
Similar to their colors, White topaz and Apophyllite 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, White topaz is Not Available while White topaz is Not Available in appearance.