Verdite and Mellite Optical Properties

Verdite

Mellite

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1 Optical Properties

1.1 Luster

Vitreous, Silky

Vitreous

1.2 Pleochroism

Extreme

Weak: yellowish brown yellowAnthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.5801.509-1.541

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c

Not Available

1.8 Birefringence

Not Available0.030

0 0.296

1.9 Clarity

Translucent

TransparentUlrich Henn and Claudio C. Milisenda

Verdite and Mellite Optic Character

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

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Verdite and Mellite Transparency

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