Crystal Quartz and Cordierite Iolite Optical Properties
Luster
Not Available
Vitreous
Pleochroism
Not Available
Strong trichroism: colorless to yellowish
Transparency
Not Available
Transparent
Refractive Index
Not Available
1.542-1.578
Optic Character
Not Available
Biaxial/+
Crystal System
Trigonal
Not Available
Birefringence
Not Available
0.008-0.012
Clarity
Not Available
Transparent
Crystal Quartz and Cordierite Iolite Optic Character
Crystal Quartz and Cordierite Iolite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Crystal Quartz and Cordierite Iolite 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 Crystal Quartz and Cordierite Iolite 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. Cordierite Iolite has Biaxial/+ character.
Crystal Quartz and Cordierite Iolite Transparency
Similar to their colors, Crystal Quartz and Cordierite Iolite 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, Crystal Quartz is Not Available while Crystal Quartz is Not Available in appearance.