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Astrophyllite
Astrophyllite

Chrysoprase
Chrysoprase



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Astrophyllite
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Chrysoprase

Astrophyllite and Chrysoprase Optical Properties

Optical Properties

Luster

Greasy, Pearly
Vitreous, Waxy

Pleochroism

Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
-

Dispersion

0.120.01
0.005 1
👆🏻

Transparency

Translucent
Translucent, Opaque, Translucent to nearly opaque

Refractive Index

1.678-1.7581.530-1.543
1 3.25
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Optic Character

-
-

Crystal System

Triclinic
Trigonal

Birefringence

0.0500.004
0 0.296
👆🏻

Clarity

Translucent
Translucent

Astrophyllite and Chrysoprase Optic Character

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

Similar to their colors, Astrophyllite and Chrysoprase 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.