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Cordierite Iolite
Cordierite Iolite

Pleonaste
Pleonaste



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Cordierite Iolite
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Pleonaste

Cordierite Iolite and Pleonaste Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
Strong trichroism: colorless to yellowish
Not Available
1.3 Dispersion
0.02NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Gemmological Tables (2004)
1.5 Refractive Index
1.542-1.5781.780
Agate Opal
1 3.25
1.6 Optic Character
Biaxial/+
Not Available
1.7 Crystal System
Not Available
Not Available
1.8 Birefringence
0.008-0.012Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Gemmological Tables (2004)

Cordierite Iolite and Pleonaste Optic Character

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

Cordierite Iolite and Pleonaste Transparency

Similar to their colors, Cordierite Iolite and Pleonaste 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.