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Fire Opal
Fire Opal

Iolite
Iolite



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Fire Opal
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Iolite

Fire Opal and Iolite Optical Properties

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1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
AbsentWalter Schumann
Not Available
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Transparent, Translucent, Transparent to translucent
1.5 Refractive Index
1.370-1.4701.52-1.56
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Amorphous
Orthorhombic
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent to translucent

Fire Opal and Iolite Optic Character

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

Fire Opal and Iolite Transparency

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