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Danburite
Danburite

Bastnasite
Bastnasite



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Danburite
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Bastnasite

Danburite and Bastnasite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Vitreous, Greasy, Pearly

Pleochroism

Weak: pale yellow yellow
Faint

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.627-1.6391.717-1.722
1 3.25
👆🏻

Optic Character

Biaxial/+
-

Crystal System

Orthorhombic
Hexagonal

Birefringence

0.0060.100
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Danburite and Bastnasite Optic Character

Danburite and Bastnasite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Danburite 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 Danburite 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. Danburite has Biaxial/+ character.

Danburite and Bastnasite Transparency

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