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Augelite
Augelite

Mellite
Mellite



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Augelite
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Mellite

Augelite and Mellite Optical Properties

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Optical Properties

Luster

Pearly
Vitreous

Pleochroism

-
Weak: yellowish brown yellowAnthony et al

Dispersion

0.020.01
0.005 1
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Transparency

-
-

Refractive Index

1.570-1.5911.509-1.541
1 3.25
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Optic Character

-
-

Crystal System

-
-

Birefringence

0.020-0.0210.030
0 0.296
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Clarity

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

Augelite and Mellite Optic Character

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

Augelite and Mellite Transparency

Similar to their colors, Augelite and Mellite 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, Augelite is while Augelite is in appearance.