Cordierite Iolite and Transvaal Jade Optical Properties

Cordierite Iolite

Transvaal Jade

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

Strong trichroism: colorless to yellowish

Not Available

1.3 Dispersion

0.020.03

0.007 1

1.4 Transparency

Transparent

Gemmological Tables (2004)

1.5 Refractive Index

1.542-1.578Not Available

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

0.008-0.012Not Available

0 0.296

1.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

Cordierite Iolite and Transvaal Jade Optic Character

Cordierite Iolite and Transvaal Jade optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Cordierite Iolite and Transvaal Jade 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 Cordierite Iolite and Transvaal Jade 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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Cordierite Iolite and Transvaal Jade Transparency

Similar to their colors, Cordierite Iolite and Transvaal Jade 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, Cordierite Iolite is Transparent while Cordierite Iolite is Transparent in appearance.