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Antigorite
Antigorite

Piemontite
Piemontite



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Antigorite
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Piemontite

Antigorite and Piemontite Optical Properties

Optical Properties

Luster

Waxy, Silky, Resinous, Greasy
Vitreous

Pleochroism

pale greenish yellow
visible

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

1.530-1.5751.725-1.756
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

-99990.025-0.076
0 0.296
👆🏻

Clarity

Translucent
-

Antigorite and Piemontite Optic Character

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

Antigorite and Piemontite Transparency

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