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Rutile and Cryolite Optical Properties


Cryolite and Rutile Optical Properties


Optical Properties

Luster
Adamantine   
Vitreous, Greasy, Pearly   

Pleochroism
Weak to distinct brownish red-green-yellow   
colorless.   

Dispersion
Not Available   
Not Available   

Transparency
Transparent, Translucent   
Gemmological Tables (2004) More from other references   

Refractive Index
2.609-2.903   
1.338-1.339   

Optic Character
Not Available   
Not Available   

Crystal System
tetragonal   
monoclinic   

Birefringence
0.296   
0.001   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Rutile and Cryolite Optic Character

Rutile and Cryolite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Rutile and Cryolite 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 Rutile and Cryolite 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.

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Rutile and Cryolite Transparency

Similar to their colors, Rutile and Cryolite 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, Rutile is Translucent and Transparent while Rutile is Translucent and Transparent in appearance.

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