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Astrophyllite
Astrophyllite

Vishnevite
Vishnevite



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Astrophyllite
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Vishnevite

Astrophyllite and Vishnevite Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Pearly
Vitreous, Pearly
1.2 Pleochroism
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Not Available
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Translucent
Not Available
1.5 Refractive Index
1.678-1.758
1.490-1.507
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Triclinic
Hexagonal
1.8 Birefringence
0.050
0.002-0.012
1.9 Clarity
Translucent
Not Available

Astrophyllite and Vishnevite Optic Character

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

Astrophyllite and Vishnevite Transparency

Similar to their colors, Astrophyllite and Vishnevite 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, Astrophyllite is Translucent while Astrophyllite is Translucent in appearance.