Nosean and Mellite Optical Properties

Nosean

Mellite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Not Available

Weak: yellowish brown yellowAnthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

Not Available1.509-1.541

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

Not Available0.030

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Nosean and Mellite Optic Character

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

Compare Blue Gemstones

Nosean Vs Powellite

Nosean Vs Pleonaste

Nosean Vs Phosphosiderite

Nosean and Mellite Transparency

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