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Kyanite
Kyanite

Herderite
Herderite



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Kyanite
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Herderite

Kyanite and Herderite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous
1.2 Pleochroism
Trichroic
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Transparent
1.5 Refractive Index
1.71-1.741.587-1.642
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Triclinic
monoclinic
1.8 Birefringence
Not Available0.028-0.032
Achroite
0 0.296
1.9 Clarity
Color grading system
Transparent

Kyanite and Herderite Optic Character

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

Kyanite and Herderite Transparency

Similar to their colors, Kyanite and Herderite 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, Kyanite is Not Available while Kyanite is Not Available in appearance.