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Black Opal and Grossular Garnet Optical Properties


Grossular Garnet and Black Opal Optical Properties


Optical Properties

Luster
Not Available   
Vitreous, Adamantine   

Pleochroism
AbsentWalter Schumann   
Not Available   

Dispersion
None   
Not Available   

Transparency
Transparent, Translucent   
Transparent   

Refractive Index
1.370-1.470   
1.738-1.745   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Isometric   

Birefringence
Not Available   
Not Available   

Clarity
Transparent   
Transparent   

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Black Opal and Grossular Garnet Optic Character

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

Similar to their colors, Black Opal and Grossular Garnet 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, Black Opal is Translucent and Transparent while Black Opal is Translucent and Transparent in appearance.

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