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Iolite
Iolite

Omphacite
Omphacite



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Iolite
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Omphacite

Iolite and Omphacite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
Not Available
Weak: colorless -- very pale green -- very pale green
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent, Transparent to translucent
TranslucentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.52-1.561.662-1.723
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Not Available
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
Transparent to translucent
TranslucentAnthony et al

Iolite and Omphacite Optic Character

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

Iolite and Omphacite Transparency

Similar to their colors, Iolite and Omphacite 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, Iolite is Translucent, Transparent and Transparent to translucent while Iolite is Translucent, Transparent and Transparent to translucent in appearance.