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Amblygonite
Amblygonite

Antigorite
Antigorite



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Amblygonite
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Antigorite

Amblygonite and Antigorite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Waxy, Silky, Resinous, Greasy

Pleochroism

weak to none
pale greenish yellow

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

-
Translucent

Refractive Index

1.578-1.6461.530-1.575
1 3.25
👆🏻

Optic Character

Biaxial/+
-

Crystal System

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

Birefringence

0.020-0.030-9999
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Amblygonite and Antigorite Optic Character

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

Amblygonite and Antigorite Transparency

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