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Danburite and Blue John Optical Properties


Blue John and Danburite Optical Properties


Optical Properties

Luster
Vitreous, Greasy   
Not Available   

Pleochroism
Weak: pale yellow yellow   
Not Available   

Dispersion
0.02   
22
Not Available   

Transparency
Gemmological Tables (2004) More from other references   
Transparent   

Refractive Index
1.627-1.639   
1.432-1.436   

Optic Character
Biaxial/+   
Not Available   

Crystal System
Orthorhombic   
Not Available   

Birefringence
0.006   
Not Available   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Transparent   

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Danburite and Blue John Optic Character

Danburite and Blue John optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Danburite and Blue John 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 Danburite and Blue John 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. Danburite has Biaxial/+ character.

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Danburite and Blue John Transparency

Similar to their colors, Danburite and Blue John 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, Danburite is Gemmological Tables (2004) More from other references while Danburite is Gemmological Tables (2004) More from other references in appearance.

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