Chrysoprase and Astrophyllite Optical Properties

Chrysoprase

Astrophyllite

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1 Optical Properties

1.1 Luster

Vitreous, Vitreous, Waxy

Greasy, Pearly

1.2 Pleochroism

AbsentWalter Schumann

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

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Translucent, Translucent, Opaque, Translucent to nearly opaque

Translucent

1.5 Refractive Index

1.530-1.5431.678-1.758

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Triclinic

1.8 Birefringence

0.0040.050

0 0.296

1.9 Clarity

Translucent

Chrysoprase and Astrophyllite Optic Character

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

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Chrysoprase and Astrophyllite Transparency

Similar to their colors, Chrysoprase 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, Chrysoprase is Opaque, Translucent, Translucent and Translucent to nearly opaque while Chrysoprase is Opaque, Translucent, Translucent and Translucent to nearly opaque in appearance.