Augite and Mottramite Optical Properties

Augite

Mottramite

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1 Optical Properties

1.1 Luster

Vitreous, Resinous

Greasy

1.2 Pleochroism

Pale green

Visible X=Y= canary yellow to greenish yellow

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

Not Available

1.5 Refractive Index

1.671-1.7742.170

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

Orthorhombic

1.8 Birefringence

Not Available0.150

0 0.296

1.9 Clarity

Transparent

Not Available

Augite and Mottramite Optic Character

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

Similar to their colors, Augite and Mottramite 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.