Melanite and Rosasite Optical Properties

Melanite

Rosasite

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1 Optical Properties

1.1 Luster

Subadamantine, Vitreous

Silky, Vitreous

1.2 Pleochroism

Not Available

Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue

1.3 Dispersion

0.06NA

0.007 1

1.4 Transparency

Translucent

Not Available

1.5 Refractive Index

1.855-1.8951.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

monoclinic

1.8 Birefringence

Not Available0.139-0.143

0 0.296

1.9 Clarity

Translucent

Not Available

Melanite and Rosasite Optic Character

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

Similar to their colors, Melanite and Rosasite 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, Melanite is Translucent while Melanite is Translucent in appearance.