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Monazite
Monazite

Alunite
Alunite



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Monazite
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Alunite

Monazite and Alunite Optical Properties

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Optical Properties

Luster

-
Vitreous, Pearly

Pleochroism

-
-

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.796-1.8411.572
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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Trigonal

Birefringence

0.0450.020
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
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Monazite and Alunite Optic Character

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

Monazite and Alunite Transparency

Similar to their colors, Monazite and Alunite 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, Monazite is while Monazite is in appearance.