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Dioptase and Coral Optical Properties


Coral and Dioptase Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
Weak; dark emerald green   
AbsentWalter Schumann   

Dispersion
0.04   
13
None   

Transparency
TranslucentHerve Nicolas Lazzarelli   
Translucent   

Refractive Index
1.644-1.720   
1.486-1.658   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Trigonal   

Birefringence
0.051-0.053   
0.160-0.172   

Clarity
TranslucentHerve Nicolas Lazzarelli   
Translucent   

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Dioptase and Coral Optic Character

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

Similar to their colors, Dioptase and Coral 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, Dioptase is TranslucentHerve Nicolas Lazzarelli while Dioptase is TranslucentHerve Nicolas Lazzarelli in appearance.

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Green Gemstones


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