Chrysoprase and Anthophyllite Optical Properties

Chrysoprase

Anthophyllite

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1 Optical Properties

1.1 Luster

Vitreous, Vitreous, Waxy

Vitreous, Pearly

1.2 Pleochroism

AbsentWalter Schumann

When Fe-rich

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Translucent, Translucent, Opaque, Translucent to nearly opaque

Transparent

1.5 Refractive Index

1.530-1.5431.603-1.690

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

Trigonal

Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma

1.8 Birefringence

0.004Not Available

0 0.296

1.9 Clarity

Translucent

Transparent

Chrysoprase and Anthophyllite Optic Character

Chrysoprase and Anthophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Chrysoprase and Anthophyllite 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 Anthophyllite 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. Anthophyllite has Biaxial/+ character.

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Chrysoprase and Anthophyllite Transparency

Similar to their colors, Chrysoprase and Anthophyllite 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.