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Bastnasite
Bastnasite

Inderite
Inderite



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Bastnasite
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Inderite

Bastnasite and Inderite Optical Properties

Optical Properties

Luster

Vitreous, Greasy, Pearly
Vitreous, Pearly, Greasy

Pleochroism

Faint
-

Dispersion

0.02-
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.717-1.7221.488-1.505
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

Hexagonal
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

Birefringence

0.1000.017
0 0.296
👆🏻

Clarity

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

Bastnasite and Inderite Optic Character

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

Bastnasite and Inderite Transparency

Similar to their colors, Bastnasite and Inderite 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.