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Dallasite and Emerald Optical Properties


Emerald and Dallasite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
Not Available   
Strong dichroism: yellow green Lazzarelli   

Dispersion
Not Available   
0.01   
26

Transparency
Not Available   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.540   
1.565-1.602   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Hexagonal   

Birefringence
0.008-0.010   
0.0040-0.0070   

Clarity
Not Available   
Color grading system   

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Dallasite and Emerald Optic Character

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

Similar to their colors, Dallasite and Emerald 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, Dallasite is Not Available while Dallasite is Not Available in appearance.

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Green Gemstones


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