Clinochlore and Cordierite Iolite Optical Properties

Clinochlore

Cordierite Iolite

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1 Optical Properties

1.1 Luster

Pearly, Greasy

Vitreous

1.2 Pleochroism

Distinct: light yellow-green to light bluE

Strong trichroism: colorless to yellowish

1.3 Dispersion

NA0.02

0.007 1

1.5 Transparency

Transparent

1.6 Refractive Index

1.571-1.5971.542-1.578

1 3.25

1.7 Optic Character

Biaxial/+

1.8 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m

Not Available

1.9 Birefringence

Not Available0.008-0.012

0 0.296

1.10 Clarity

Transparent

Clinochlore and Cordierite Iolite Optic Character

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

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Clinochlore Vs Dravite

Clinochlore Vs Dioptase

Clinochlore Vs Demantoid

Clinochlore and Cordierite Iolite Transparency

Similar to their colors, Clinochlore 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, Clinochlore is Transparent while Clinochlore is Transparent in appearance.