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Friedelite
Friedelite

Mottramite
Mottramite



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Friedelite
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Mottramite

Friedelite and Mottramite Optical Properties

Optical Properties

Luster

-
Greasy

Pleochroism

-
Visible X=Y= canary yellow to greenish yellow

Dispersion

0.040.04
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

1.627-1.6632.170
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.032-0.0350.150
0 0.296
👆🏻

Clarity

Translucent
-

Friedelite and Mottramite Optic Character

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

Friedelite and Mottramite Transparency

Similar to their colors, Friedelite 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, Friedelite is Translucent while Friedelite is Translucent in appearance.