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Astrophyllite
Astrophyllite

Hodgkinsonite
Hodgkinsonite



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Astrophyllite
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Hodgkinsonite

Astrophyllite and Hodgkinsonite Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Pearly
Vitreous
1.2 Pleochroism
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Lavender and pale purple for transparent pink stones.Michael O’Donoghue
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Gems
1.5 Refractive Index
1.678-1.7581.720-1.746
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Triclinic
monoclinic
1.8 Birefringence
0.0500.026
Achroite
0 0.296
1.9 Clarity
Translucent
Gems

Astrophyllite and Hodgkinsonite Optic Character

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

Similar to their colors, Astrophyllite and Hodgkinsonite 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.