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Alunite
Alunite

Moonstone
Moonstone



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Alunite
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Moonstone

Alunite and Moonstone Optical Properties

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Optical Properties

Luster

Vitreous, Pearly
Pearly

Pleochroism

-
-

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

-
Transparent, Transparent to translucent

Refractive Index

1.5721.518-1.527
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
monoclinic

Birefringence

0.0200.006-0.007
0 0.296
👆🏻

Clarity

-
Transparent

Alunite and Moonstone Optic Character

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

Alunite and Moonstone Transparency

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