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Mottramite
Mottramite

Brookite
Brookite



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Mottramite
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Brookite

Mottramite and Brookite Optical Properties

Optical Properties

Luster

Greasy
Adamantine

Pleochroism

Visible X=Y= canary yellow to greenish yellow
Very weak

Dispersion

0.040.20
0.005 1
👆🏻

Transparency

-
-

Refractive Index

2.1702.583-2.741
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.1500.117
0 0.296
👆🏻

Clarity

-
-

Mottramite and Brookite Optic Character

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

Similar to their colors, Mottramite and Brookite 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.