Crystal Quartz and Sillimanite Optical Properties
Luster
Not Available
Vitreous, Subadamantine, Silky
Pleochroism
Not Available
Colourless to pale brown to yellow
Dispersion
Not Available
Not Available
Transparency
Not Available
Transparent, Translucent
Refractive Index
Not Available
1.653-1.685
Optic Character
Not Available
Not Available
Crystal System
Trigonal
Orthorhombic
Birefringence
Not Available
0.020-0.022
Clarity
Not Available
Transparent
Crystal Quartz and Sillimanite Optic Character
Crystal Quartz and Sillimanite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Crystal Quartz and Sillimanite 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 Sillimanite 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.
Crystal Quartz and Sillimanite Transparency
Similar to their colors, Crystal Quartz and Sillimanite 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.