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Aragonite
Aragonite

Topaz
Topaz



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Aragonite
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Topaz

Aragonite and Topaz Optical Properties

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Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

StrongArthur Thomas
Weak

Dispersion

0.170.01
0.005 1
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Transparency

Transparent, Translucent
Transparent

Refractive Index

1.525-1.6861.606-1.644
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.1550.008-0.011
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Aragonite and Topaz Optic Character

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

Aragonite and Topaz Transparency

Similar to their colors, Aragonite and Topaz 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, Aragonite is Transparent and Translucent while Aragonite is Transparent and Translucent in appearance.