Super Seven Crystals and Sillimanite Optical Properties

Super Seven Crystals

Sillimanite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly, Silky

Vitreous, Subadamantine, Silky

1.2 Pleochroism

Not Available

Colourless to pale brown to yellow

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent, Opaque

Transparent, Translucent

1.5 Refractive Index

1.519-1.5211.653-1.685

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Orthorhombic

1.8 Birefringence

0.0090-0.01000.020-0.022

0 0.296

1.9 Clarity

Not Available

Transparent

Super Seven Crystals and Sillimanite Optic Character

Super Seven Crystals and Sillimanite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Super Seven Crystals 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 Super Seven Crystals 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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Super Seven Crystals and Sillimanite Transparency

Similar to their colors, Super Seven Crystals 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, Super Seven Crystals is Opaque, Translucent and Transparent while Super Seven Crystals is Opaque, Translucent and Transparent in appearance.