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Aragonite
Aragonite

Achroite
Achroite



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Aragonite
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Achroite

Aragonite and Achroite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
-

Pleochroism

StrongArthur Thomas
-

Dispersion

0.170.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent, Translucent

Refractive Index

1.525-1.6861.614-1.666
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
-

Birefringence

0.1550.014-0.040
0 0.296
👆🏻

Clarity

Transparent
Transparent

Aragonite and Achroite Optic Character

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

Similar to their colors, Aragonite and Achroite 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.