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Bastnasite
Bastnasite

Quartz
Quartz



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Bastnasite
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Quartz

Bastnasite and Quartz Optical Properties

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Optical Properties

Luster

Vitreous, Greasy, Pearly
Vitreous

Pleochroism

Faint
None

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

-
Transparent, Translucent, Transparent to translucent

Refractive Index

1.717-1.7221.544-1.553
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
Trigonal

Birefringence

0.1000.009
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Opaque

Bastnasite and Quartz Optic Character

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

Similar to their colors, Bastnasite and Quartz 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.