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Brookite
Brookite

Sapphire
Sapphire



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Brookite
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Sapphire

Brookite and Sapphire Optical Properties

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Optical Properties

Luster

Adamantine
Vitreous, Adamantine

Pleochroism

Very weak
Strong

Dispersion

0.200.02
0.005 1
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Transparency

-
Transparent, Translucent, Transparent to opaque

Refractive Index

2.583-2.7411.762-1.788
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Trigonal

Birefringence

0.1170.008-0.009
0 0.296
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Clarity

-
Transparent

Brookite and Sapphire Optic Character

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

Similar to their colors, Brookite and Sapphire 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.