Chrome-Chalcedony and Sillimanite Optical Properties

Chrome-Chalcedony

Sillimanite

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1 Optical Properties

1.1 Luster

Waxy

Vitreous, Subadamantine, Silky

1.2 Pleochroism

Not Available

Colourless to pale brown to yellow

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

Transparent, Translucent

1.5 Refractive Index

1.530-1.5431.653-1.685

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Orthorhombic

1.8 Birefringence

0.003-0.0090.020-0.022

0 0.296

1.9 Clarity

Translucent

Transparent

Chrome-Chalcedony and Sillimanite Optic Character

Chrome-Chalcedony and Sillimanite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Chrome-Chalcedony 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 Chrome-Chalcedony 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.

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Chrome-Chalcedony and Sillimanite Transparency

Similar to their colors, Chrome-Chalcedony 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, Chrome-Chalcedony is Translucent while Chrome-Chalcedony is Translucent in appearance.