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Opal
Opal

Smithsonite
Smithsonite



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Opal
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Smithsonite

Opal and Smithsonite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous, Pearly
1.2 Pleochroism
None
AbsentWalter Schumann
1.3 Dispersion
None0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent, Transparent to translucent
Translucent
1.5 Refractive Index
1.37-1.521.620-1.850
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Trigonal
1.8 Birefringence
Not Available0.223-0.227
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Opal and Smithsonite Optic Character

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

Similar to their colors, Opal and Smithsonite 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.