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Mottramite
Mottramite

Sunstone
Sunstone



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Mottramite
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Sunstone

Mottramite and Sunstone Optical Properties

Optical Properties

Luster

Greasy
Vitreous

Pleochroism

Visible X=Y= canary yellow to greenish yellow
Weak or absentWalter Schumann

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

-
Transparent, Translucent, Transparent to translucent

Refractive Index

2.1701.53-1.55
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Triclinic

Birefringence

0.1500.007-0.010
0 0.296
👆🏻

Clarity

-
Transparent to translucent

Mottramite and Sunstone Optic Character

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

Mottramite and Sunstone Transparency

Similar to their colors, Mottramite and Sunstone 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, Mottramite is while Mottramite is in appearance.