Cacoxenite and Sillimanite Optical Properties

Cacoxenite

Sillimanite

Add ⊕

1 Optical Properties

1.1 Luster

Silky

Vitreous, Subadamantine, Silky

1.2 Pleochroism

visible: O = Pale yellow E = Canary yellow to yellow orange

Colourless to pale brown to yellow

1.3 Dispersion

NANA

0.007 1

1.9 Transparency

Not Available

Transparent, Translucent

1.10 Refractive Index

1.575-1.5851.653-1.685

1 3.25

1.12 Optic Character

Not Available

1.13 Crystal System

Hexagonal

Orthorhombic

1.14 Birefringence

Not Available0.020-0.022

0 0.296

1.15 Clarity

Not Available

Transparent

Cacoxenite and Sillimanite Optic Character

Cacoxenite and Sillimanite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Cacoxenite and Sillimanite 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 Cacoxenite and Sillimanite 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 Green Gemstones

Cacoxenite Vs Actinolite

Cacoxenite Vs Adamite

Cacoxenite Vs Aegirine

Cacoxenite and Sillimanite Transparency

Similar to their colors, Cacoxenite and Sillimanite 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, Cacoxenite is Not Available while Cacoxenite is Not Available in appearance.