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Charlesite
Charlesite

Bastnasite
Bastnasite



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Charlesite
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Bastnasite

Charlesite and Bastnasite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Greasy, Pearly

Pleochroism

Nearly colorless to pale golden yellow
Faint

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.4921.717-1.722
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
Hexagonal

Birefringence

-99990.100
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Charlesite and Bastnasite Optic Character

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

Charlesite and Bastnasite Transparency

Similar to their colors, Charlesite 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, Charlesite is while Charlesite is in appearance.