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Vesuvianite
Vesuvianite

Astrophyllite
Astrophyllite



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Vesuvianite
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Astrophyllite

Vesuvianite and Astrophyllite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Greasy, Pearly

Pleochroism

slight in colored varieties
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow

Dispersion

0.030.12
0.005 1
👆🏻

Transparency

-
Translucent

Refractive Index

1.703-1.7521.678-1.758
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
Triclinic

Birefringence

0.004-0.0060.050
0 0.296
👆🏻

Clarity

-
Translucent

Vesuvianite and Astrophyllite Optic Character

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

Vesuvianite and Astrophyllite Transparency

Similar to their colors, Vesuvianite 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, Vesuvianite is while Vesuvianite is in appearance.