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Triplite
Triplite

Mellite
Mellite



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Triplite
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Mellite

Triplite and Mellite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

DistinctArthur Thomas
Weak: yellowish brown yellowAnthony et al

Dispersion

0.040.01
0.005 1
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Transparency

Translucent
-

Refractive Index

1.643-1.7031.509-1.541
1 3.25
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Optic Character

-
-

Crystal System

-
-

Birefringence

0.0200.030
0 0.296
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Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Triplite and Mellite Optic Character

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

Triplite and Mellite Transparency

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