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Piemontite
Piemontite

Antigorite
Antigorite



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Piemontite
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Antigorite

Piemontite and Antigorite Optical Properties

Optical Properties

Luster

Vitreous
Waxy, Silky, Resinous, Greasy

Pleochroism

visible
pale greenish yellow

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
Translucent

Refractive Index

1.725-1.7561.530-1.575
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.025-0.076-9999
0 0.296
👆🏻

Clarity

-
Translucent

Piemontite and Antigorite Optic Character

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

Piemontite and Antigorite Transparency

Similar to their colors, Piemontite 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, Piemontite is while Piemontite is in appearance.