Augite and Antigorite Optical Properties

Augite

Antigorite

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1 Optical Properties

1.1 Luster

Vitreous, Resinous

Waxy, Silky, Resinous, Greasy

1.2 Pleochroism

Pale green

pale greenish yellow.

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

Translucent

1.5 Refractive Index

1.671-1.7741.530-1.575

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

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

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

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Translucent

Augite and Antigorite Optic Character

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

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Augite and Antigorite Transparency

Similar to their colors, Augite 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, Augite is Translucent and Transparent while Augite is Translucent and Transparent in appearance.