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Kyanite
Kyanite

Astrophyllite
Astrophyllite



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Kyanite
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Astrophyllite

Kyanite and Astrophyllite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Greasy, Pearly
1.2 Pleochroism
Trichroic
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Translucent
1.5 Refractive Index
1.71-1.741.678-1.758
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Triclinic
Triclinic
1.8 Birefringence
Not Available0.050
Achroite
0 0.296
1.9 Clarity
Color grading system
Translucent

Kyanite and Astrophyllite Optic Character

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

Kyanite and Astrophyllite Transparency

Similar to their colors, Kyanite 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, Kyanite is Not Available while Kyanite is Not Available in appearance.