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Mellite
Mellite

Geodes
Geodes



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Mellite
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Geodes

Mellite and Geodes Optical Properties

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Optical Properties

Luster

Vitreous
-

Pleochroism

Weak: yellowish brown yellowAnthony et al
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Dispersion

0.010.01
0.005 1
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Transparency

-
-

Refractive Index

1.509-1.541-9999
1 3.25
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Optic Character

-
-

Crystal System

-
-

Birefringence

0.030-9999
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
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Mellite and Geodes Optic Character

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

Mellite and Geodes Transparency

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