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Grossular
Grossular

Bastnasite
Bastnasite



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Grossular
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Bastnasite

Grossular and Bastnasite Optical Properties

Optical Properties

Luster

Greasy, Vitreous
Vitreous, Greasy, Pearly

Pleochroism

None
Faint

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.730-1.7601.717-1.722
1 3.25
👆🏻

Optic Character

-
-

Crystal System

cubic
Hexagonal

Birefringence

0.0200.100
0 0.296
👆🏻

Clarity

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

Grossular and Bastnasite Optic Character

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

Grossular and Bastnasite Transparency

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