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Schorl
Schorl

Cordierite Iolite
Cordierite Iolite



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Schorl
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Cordierite Iolite

Schorl and Cordierite Iolite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
Very strong: yellow-brown pale yellow
Strong trichroism: colorless to yellowish
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Transparent
1.5 Refractive Index
1.635-1.6721.542-1.578
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Not Available
Not Available
1.8 Birefringence
0.0250.008-0.012
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Schorl and Cordierite Iolite Optic Character

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

Schorl and Cordierite Iolite Transparency

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