Antigorite and Augite Optical Properties

Antigorite

Augite

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1 Optical Properties

1.1 Luster

Waxy, Silky, Resinous, Greasy

Vitreous, Resinous

1.2 Pleochroism

pale greenish yellow.

Pale green

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

Transparent, Translucent

1.5 Refractive Index

1.530-1.5751.671-1.774

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

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

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Translucent

Transparent

Antigorite and Augite Optic Character

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

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Antigorite and Augite Transparency

Similar to their colors, Antigorite and Augite 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.