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Astrophyllite
Astrophyllite

Sunstone
Sunstone



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Astrophyllite
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Sunstone

Astrophyllite and Sunstone Optical Properties

Optical Properties

Luster

Greasy, Pearly
Vitreous

Pleochroism

Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Weak or absentWalter Schumann

Dispersion

0.120.01
0.005 1
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Transparency

Translucent
Transparent, Translucent, Transparent to translucent

Refractive Index

1.678-1.7581.53-1.55
1 3.25
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Optic Character

-
-

Crystal System

Triclinic
Triclinic

Birefringence

0.0500.007-0.010
0 0.296
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Clarity

Translucent
Transparent to translucent

Astrophyllite and Sunstone Optic Character

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

Similar to their colors, Astrophyllite and Sunstone 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.