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Rutile and Astrophyllite Optical Properties


Astrophyllite and Rutile Optical Properties


Optical Properties

Luster
Adamantine   
Greasy, Pearly   

Pleochroism
Weak to distinct brownish red-green-yellow   
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow   

Dispersion
Not Available   
Not Available   

Transparency
Transparent, Translucent   
Translucent   

Refractive Index
2.609-2.903   
1.678-1.758   

Optic Character
Not Available   
Not Available   

Crystal System
tetragonal   
Triclinic   

Birefringence
0.296   
0.050   

Clarity
Transparent   
Translucent   

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Rutile and Astrophyllite Optic Character

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

Similar to their colors, Rutile and Astrophyllite 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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