Catapleiite and Mellite Optical Properties

Catapleiite

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

NANA

0.007 1

1.4 Transparency

TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.590-1.6291.509-1.541

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: B2/b (pseudo-HEX)

Not Available

1.8 Birefringence

0.0390.030

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Catapleiite and Mellite Optic Character

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

Similar to their colors, Catapleiite 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, Catapleiite is Gemmological Tables (2004) and TransparentUlrich Henn and Claudio C. Milisenda while Catapleiite is Gemmological Tables (2004) and TransparentUlrich Henn and Claudio C. Milisenda in appearance.