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Aragonite
Aragonite

Thulite
Thulite



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Aragonite
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Thulite

Aragonite and Thulite Optical Properties

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Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

StrongArthur Thomas
Present

Dispersion

0.170.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.

Refractive Index

1.525-1.6861.695
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.1550.006-0.018
0 0.296
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Clarity

Transparent
OpaqueHerve Nicolas Lazzarelli

Aragonite and Thulite Optic Character

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

Similar to their colors, Aragonite and Thulite 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.