Chrysoberyl and Cordierite Iolite Optical Properties

Chrysoberyl

Cordierite Iolite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

X = red; Y = yellow-orange; Z = emerald-green

Strong trichroism: colorless to yellowish

1.3 Dispersion

Albite Optical ..

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▼

0.02

Rank: 24 (Overall)▶

0.02

Rank: 22 (Overall)▶

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Fluorite Optical Properties

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0.044 (Anglesite Opt..)

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1.4 Transparency

Transparent, Translucent, Transparent to translucent

Transparent

1.5 Refractive Index

1.746-1.763

1.542-1.578

1.6 Optic Character

Biaxial/+

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.007-0.013

0.008-0.012

1.9 Clarity

Transparent

Chrysoberyl and Cordierite Iolite Optic Character

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

Compare Green Gemstones

Chrysoberyl Vs Dallasite

Chrysoberyl Vs Common Opal

Chrysoberyl Vs Datolite

Chrysoberyl and Cordierite Iolite Transparency

Similar to their colors, Chrysoberyl 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, Chrysoberyl is Translucent, Transparent and Transparent to translucent while Chrysoberyl is Translucent, Transparent and Transparent to translucent in appearance.

Green Gemstones

Chrysoprase

Chrysotile

Clinochlore

Clinozoisite

Common Opal

Dallasite