Home
Gemstones


Dravite and Iolite Optical Properties


Iolite and Dravite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Very strong: pale yellow colorless   
Not Available   

Dispersion
0.02   
22
Not Available   

Transparency
Transparent   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.614-1.666   
1.52-1.56   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m   
Orthorhombic   

Birefringence
0.014-0.032   
Not Available   

Clarity
Transparent   
Transparent to translucent   

Benefits >>
<< Physical Properties

Dravite and Iolite Optic Character

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

Compare Blue Gemstones

Dravite and Iolite Transparency

Similar to their colors, Dravite and Iolite 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.

Blue Gemstones

Blue Gemstones


Compare Blue Gemstones