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Alabaster
Alabaster

Mellite
Mellite



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Alabaster
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Mellite

Alabaster and Mellite Optical Properties

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Optical Properties

Luster

-
Vitreous

Pleochroism

-
Weak: yellowish brown yellowAnthony et al

Dispersion

-0.01
0.005 1
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Transparency

Translucent
-

Refractive Index

1.520-1.5301.509-1.541
1 3.25
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Optic Character

-
-

Crystal System

-
-

Birefringence

0.0100.030
0 0.296
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Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Alabaster and Mellite Optic Character

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

Alabaster and Mellite Transparency

Similar to their colors, Alabaster 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, Alabaster is Translucent while Alabaster is Translucent in appearance.