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Boracite
Boracite

Sapphire
Sapphire



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Boracite
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Sapphire

Boracite and Sapphire Optical Properties

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Optical Properties

Luster

Vitreous, Adamantine
Vitreous, Adamantine

Pleochroism

None
Strong

Dispersion

-0.02
0.005 1
👆🏻

Transparency

Transparent
Transparent, Translucent, Transparent to opaque

Refractive Index

1.658-1.6731.762-1.788
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Trigonal

Birefringence

0.010-0.0110.008-0.009
0 0.296
👆🏻

Clarity

Transparent
Transparent

Boracite and Sapphire Optic Character

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

Boracite and Sapphire Transparency

Similar to their colors, Boracite 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, Boracite is Transparent while Boracite is Transparent in appearance.