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Aragonite
Aragonite

Bastnasite
Bastnasite



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Aragonite
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Bastnasite

Aragonite and Bastnasite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Vitreous, Greasy, Pearly

Pleochroism

StrongArthur Thomas
Faint

Dispersion

0.170.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.525-1.6861.717-1.722
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Hexagonal

Birefringence

0.1550.100
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Aragonite and Bastnasite Optic Character

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

Similar to their colors, Aragonite and Bastnasite 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.