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Calcite
Calcite

Bastnasite
Bastnasite



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Calcite
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Bastnasite

Calcite and Bastnasite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous, Greasy, Pearly

Pleochroism

-
Faint

Dispersion

0.150.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.486-1.6581.717-1.722
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
Hexagonal

Birefringence

0.154-0.1740.100
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Calcite and Bastnasite Optic Character

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

Calcite and Bastnasite Transparency

Similar to their colors, Calcite 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, Calcite is Transparent and Translucent while Calcite is Transparent and Translucent in appearance.