Astrophyllite and Beryl Optical Properties

Astrophyllite

Beryl

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1 Optical Properties

1.1 Luster

Greasy, Pearly

Vitreous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous

1.2 Pleochroism

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

Weak to distinct

1.3 Dispersion

NA0.01

0.007 1

1.4 Transparency

Translucent

Transparent, Transparent to opaque

1.5 Refractive Index

1.678-1.7581.560-1.604

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic

Hexagonal

1.8 Birefringence

0.0500.0040-0.0070

0 0.296

1.9 Clarity

Translucent

Transparent

Astrophyllite and Beryl Optic Character

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

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Astrophyllite and Beryl Transparency

Similar to their colors, Astrophyllite and Beryl 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.