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Microcline
Microcline

Mellite
Mellite



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Microcline
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Mellite

Microcline and Mellite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

-
Weak: yellowish brown yellowAnthony et al

Dispersion

0.010.01
0.005 1
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Transparency

Translucent
-

Refractive Index

1.514-1.5391.509-1.541
1 3.25
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Optic Character

-
-

Crystal System

Triclinic Pinacoidal H-M Symbol (1) Space Group: P1
-

Birefringence

0.008-0.0100.030
0 0.296
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Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Microcline and Mellite Optic Character

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

Microcline and Mellite Transparency

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