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Precious Opal and Goethite Optical Properties


Goethite and Precious Opal Optical Properties


Optical Properties

Luster
Not Available   
Adamantine   

Pleochroism
AbsentWalter Schumann   
VisibleArthur Thomas   

Dispersion
None   
Not Available   

Transparency
Transparent, Translucent   
Gemstones (2009)   

Refractive Index
1.370-1.470   
2.26-2.398   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Orthorhombic   

Birefringence
Not Available   
0.138   

Clarity
Transparent   
Gemstones (2009)   

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<< Physical Properties

Precious Opal and Goethite Optic Character

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

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Precious Opal and Goethite Transparency

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

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