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Astrophyllite
Astrophyllite

Friedelite
Friedelite



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Astrophyllite
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Friedelite

Astrophyllite and Friedelite Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Pearly
Not Available
1.2 Pleochroism
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
NilArthur Thomas
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Translucent
1.5 Refractive Index
1.678-1.7581.627-1.663
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Triclinic
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m
1.8 Birefringence
0.0500.032-0.035
Achroite
0 0.296
1.9 Clarity
Translucent
Translucent

Astrophyllite and Friedelite Optic Character

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

Similar to their colors, Astrophyllite and Friedelite 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.