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Dumortierite
Dumortierite

Kyanite Cyprine
Kyanite Cyprine



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Dumortierite
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Kyanite Cyprine

Dumortierite and Kyanite Cyprine Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli
1.3 Dispersion
Albite Optical ..
None
Rank: N/A (Overall)
0.02
Rank: 18 (Overall)
Fluorite Optical Properties
1.4 Transparency
Translucent, Translucent to opaque
Transparent
1.5 Refractive Index
1.669-1.723
1.710-1.735
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Orthorhombic
Not Available
1.8 Birefringence
0.011-0.037
0.012-0.033
1.9 Clarity
Translucent
Transparent

Dumortierite and Kyanite Cyprine Optic Character

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

Dumortierite and Kyanite Cyprine Transparency

Similar to their colors, Dumortierite and Kyanite Cyprine 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, Dumortierite is Translucent and Translucent to opaque while Dumortierite is Translucent and Translucent to opaque in appearance.