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Antigorite
Antigorite

Mellite
Mellite



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Antigorite
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Mellite

Antigorite and Mellite Optical Properties

Optical Properties

Luster

Waxy, Silky, Resinous, Greasy
Vitreous

Pleochroism

pale greenish yellow
Weak: yellowish brown yellowAnthony et al

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

1.530-1.5751.509-1.541
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

-99990.030
0 0.296
👆🏻

Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Antigorite and Mellite Optic Character

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

Similar to their colors, Antigorite and Mellite 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.