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Tigers Eye
Tigers Eye

Cordierite Iolite
Cordierite Iolite



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Tigers Eye
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Cordierite Iolite

Tigers Eye and Cordierite Iolite Optical Properties

1 Optical Properties
1.1 Luster
Silky
Vitreous
1.2 Pleochroism
Not Available
Strong trichroism: colorless to yellowish
1.3 Dispersion
None0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Opaque
Transparent
1.5 Refractive Index
1.534-1.5401.542-1.578
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Trigonal
Not Available
1.8 Birefringence
Not Available0.008-0.012
Achroite
0 0.296
1.9 Clarity
Gemstones of the world (2001) More from other references
Transparent

Tigers Eye and Cordierite Iolite Optic Character

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

Tigers Eye and Cordierite Iolite Transparency

Similar to their colors, Tigers Eye 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, Tigers Eye is Opaque while Tigers Eye is Opaque in appearance.