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Pezzottaite
Pezzottaite

Mottramite
Mottramite



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Pezzottaite
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Mottramite

Pezzottaite and Mottramite Optical Properties

Optical Properties

Luster

Vitreous
Greasy

Pleochroism

Moderate dichroic
Visible X=Y= canary yellow to greenish yellow

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.598-1.6202.170
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
Orthorhombic

Birefringence

0.008-0.0110.150
0 0.296
👆🏻

Clarity

Transparent
-

Pezzottaite and Mottramite Optic Character

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

Pezzottaite and Mottramite Transparency

Similar to their colors, Pezzottaite 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, Pezzottaite is Transparent while Pezzottaite is Transparent in appearance.