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Pyrophyllite
Pyrophyllite

Antigorite
Antigorite



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Pyrophyllite
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Antigorite

Pyrophyllite and Antigorite Optical Properties

Optical Properties

Luster

Pearly
Waxy, Silky, Resinous, Greasy

Pleochroism

-
pale greenish yellow

Dispersion

0.050.02
0.005 1
👆🏻

Transparency

Translucent
Translucent

Refractive Index

1.534-1.6011.530-1.575
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Monoclinic Domatic H-M Symbol (m) Space Group: Cm

Birefringence

0.050-9999
0 0.296
👆🏻

Clarity

Translucent
Translucent

Pyrophyllite and Antigorite Optic Character

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

Pyrophyllite and Antigorite Transparency

Similar to their colors, Pyrophyllite and Antigorite 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, Pyrophyllite is Translucent while Pyrophyllite is Translucent in appearance.