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Sardonyx
Sardonyx

Astrophyllite
Astrophyllite



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Sardonyx
X
Astrophyllite

Sardonyx and Astrophyllite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Greasy, Pearly
1.2 Pleochroism
Not Available
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Translucent
1.5 Refractive Index
1.530-1.5431.678-1.758
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Triclinic
1.8 Birefringence
0.008-0.0100.050
Achroite
0 0.296
1.9 Clarity
Translucent
Translucent

Sardonyx and Astrophyllite Optic Character

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

Sardonyx and Astrophyllite Transparency

Similar to their colors, Sardonyx 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, Sardonyx is Translucent while Sardonyx is Translucent in appearance.