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Astrophyllite
Astrophyllite

Sugilite
Sugilite



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Astrophyllite
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Sugilite

Astrophyllite and Sugilite 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
Weak
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Translucent
Translucent
1.5 Refractive Index
1.678-1.758
1.607-1.612
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Triclinic
Hexagonal
1.8 Birefringence
0.050
0.003
1.9 Clarity
Translucent
Translucent

Astrophyllite and Sugilite Optic Character

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

Similar to their colors, Astrophyllite and Sugilite 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.

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