Super Seven Crystals and Cordierite Iolite Optical Properties

Super Seven Crystals

Cordierite Iolite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly, Silky

Vitreous

1.2 Pleochroism

Not Available

Strong trichroism: colorless to yellowish

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Transparent, Translucent, Opaque

Transparent

1.5 Refractive Index

1.519-1.5211.542-1.578

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

monoclinic

Not Available

1.8 Birefringence

0.0090-0.01000.008-0.012

0 0.296

1.9 Clarity

Not Available

Transparent

Super Seven Crystals and Cordierite Iolite Optic Character

Super Seven Crystals and Cordierite Iolite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Super Seven Crystals and Cordierite Iolite 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 Cordierite Iolite 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. Cordierite Iolite has Biaxial/+ character.

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Super Seven Crystals and Cordierite Iolite Transparency

Similar to their colors, Super Seven Crystals and Cordierite Iolite 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.