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Hackmanite
Hackmanite

Bastnasite
Bastnasite



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Hackmanite
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Bastnasite

Hackmanite and Bastnasite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Greasy, Pearly

Pleochroism

-
Faint

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.483-1.4871.717-1.722
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Hexagonal

Birefringence

-99990.100
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Hackmanite and Bastnasite Optic Character

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

Hackmanite and Bastnasite Transparency

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