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Jacobsite
Jacobsite

Bastnasite
Bastnasite



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Jacobsite
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Bastnasite

Jacobsite and Bastnasite Optical Properties

Optical Properties

Luster

-
Vitreous, Greasy, Pearly

Pleochroism

-
Faint

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

-99991.717-1.722
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Hexagonal

Birefringence

-99990.100
0 0.296
👆🏻

Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Jacobsite and Bastnasite Optic Character

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

Jacobsite and Bastnasite Transparency

Similar to their colors, Jacobsite 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, Jacobsite is Translucent while Jacobsite is Translucent in appearance.