Crocoite and Mellite Optical Properties

Crocoite

Mellite

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1 Optical Properties

1.1 Luster

Adamantine

Vitreous

1.2 Pleochroism

Distinctly trichroic

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

2.31-2.661.509-1.541

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/n

Not Available

1.8 Birefringence

Not Available0.030

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Crocoite and Mellite Optic Character

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

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