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Aragonite
Aragonite

Apatite
Apatite



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Aragonite
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Apatite

Aragonite and Apatite Optical Properties

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Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

StrongArthur Thomas
Blue stones – strong

Dispersion

0.170.01
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.525-1.6861.628-1.651
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Hexagonal

Birefringence

0.1550.002-0.008
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Aragonite and Apatite Optic Character

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

Similar to their colors, Aragonite and Apatite 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.