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Moonstone
Moonstone

Mottramite
Mottramite



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Moonstone
X
Mottramite

Moonstone and Mottramite Optical Properties

Optical Properties

Luster

Pearly
Greasy

Pleochroism

-
Visible X=Y= canary yellow to greenish yellow

Dispersion

0.010.04
0.005 1
👆🏻

Transparency

Transparent, Transparent to translucent
-

Refractive Index

1.518-1.5272.170
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Orthorhombic

Birefringence

0.006-0.0070.150
0 0.296
👆🏻

Clarity

Transparent
-

Moonstone and Mottramite Optic Character

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

Moonstone and Mottramite Transparency

Similar to their colors, Moonstone 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, Moonstone is Transparent and Transparent to translucent while Moonstone is Transparent and Transparent to translucent in appearance.