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Linarite
Linarite

Mellite
Mellite



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Linarite
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Mellite

Linarite and Mellite Optical Properties

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Optical Properties

Luster

Sub-Adamantine, Vitreous
Vitreous

Pleochroism

X = pale blue; Y = blue; Z = Prussian blue
Weak: yellowish brown yellowAnthony et al

Dispersion

0.050.01
0.005 1
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Transparency

Transparent
-

Refractive Index

1.809-1.8591.509-1.541
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
-

Birefringence

0.0500.030
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Linarite and Mellite Optic Character

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

Linarite and Mellite Transparency

Similar to their colors, Linarite 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, Linarite is Transparent while Linarite is Transparent in appearance.