Leucite and Mellite Optical Properties

Leucite

Mellite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Not Available

Weak: yellowish brown yellowAnthony et al

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.504-1.5101.509-1.541

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Not Available

1.8 Birefringence

0.0010.030

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Leucite and Mellite Optic Character

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

Similar to their colors, Leucite 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, Leucite is Gemmological Tables (2004) More from other references while Leucite is Gemmological Tables (2004) More from other references in appearance.