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Cordierite Iolite
Cordierite Iolite

Sonolite
Sonolite



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Cordierite Iolite
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Sonolite

Cordierite Iolite and Sonolite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
Strong trichroism: colorless to yellowish
Not Available
1.3 Dispersion
Albite Optical ..
0.02
Rank: 22 (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Transparent
TransparentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.542-1.578
1.763-1.793
1.6 Optic Character
Biaxial/+
Not Available
1.7 Crystal System
Not Available
Not Available
1.8 Birefringence
0.008-0.012
Not Available
1.9 Clarity
Transparent
TransparentAnthony et al

Cordierite Iolite and Sonolite Optic Character

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

Similar to their colors, Cordierite Iolite and Sonolite 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.