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Bastnasite
Bastnasite

Ammolite
Ammolite



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Bastnasite
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Ammolite

Bastnasite and Ammolite Optical Properties

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Greasy, Pearly
Faint
0.02
-
1.717-1.722
-
Hexagonal
0.100
TransparentUlrich Henn and Claudio C. Milisenda
 
Silky, Vitreous
None
0.01
-
1.520-1.670
-
Trigonal
0.135-0.145
-

Bastnasite and Ammolite Optic Character

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

Bastnasite and Ammolite Transparency

Similar to their colors, Bastnasite and Ammolite 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, Bastnasite is while Bastnasite is in appearance.