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Dravite and Indicolite Blue Tourmaline Optical Properties


Indicolite Blue Tourmaline and Dravite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
Very strong: pale yellow colorless   
Strong: dark blue light blueWalter Schumann   

Dispersion
0.02   
22
0.02   
22

Transparency
Transparent   
Transparent, Translucent   

Refractive Index
1.614-1.666   
1.614-1.666   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m   
Not Available   

Birefringence
0.014-0.032   
0.014-0.040   

Clarity
Transparent   
Transparent   

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Dravite and Indicolite Blue Tourmaline Optic Character

Dravite and Indicolite Blue Tourmaline optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Dravite and Indicolite Blue Tourmaline 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 Dravite and Indicolite Blue Tourmaline 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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Dravite and Indicolite Blue Tourmaline Transparency

Similar to their colors, Dravite and Indicolite Blue Tourmaline 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, Dravite is Transparent while Dravite is Transparent in appearance.

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