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Opal
Opal

Charoite
Charoite



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Opal
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Charoite

Opal and Charoite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Pearly
Pearly, Fibrous, Chatoyant
1.2 Pleochroism
None
NilArthur Thomas
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent, Transparent to translucent
Translucent
1.5 Refractive Index
1.37-1.521.545-1.560
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Triclinic
1.8 Birefringence
Not Available0.009
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Opal and Charoite Optic Character

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

Opal and Charoite Transparency

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