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Brookite
Brookite

Beryllonite
Beryllonite



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Brookite
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Beryllonite

Brookite and Beryllonite Optical Properties

Optical Properties

Luster

Adamantine
Vitreous, Adamantine, Pearly

Pleochroism

Very weak
-

Dispersion

0.200.01
0.005 1
👆🏻

Transparency

-
-

Refractive Index

2.583-2.7411.552-1.562
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
monoclinic

Birefringence

0.1170.009
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Brookite and Beryllonite Optic Character

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

Brookite and Beryllonite Transparency

Similar to their colors, Brookite and Beryllonite 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, Brookite is while Brookite is in appearance.