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Alexandrite
Alexandrite

Eosphorite
Eosphorite



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Alexandrite
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Eosphorite

Alexandrite and Eosphorite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Resinous
1.2 Pleochroism
Not Available
Visible: X = yellow; Y = pink; Z = pale pink to colorless
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Transparent to nearly opaque
Transparent
1.5 Refractive Index
1.739-1.7701.639-1.672
Agate Opal
1 3.25
1.6 Optic Character
Biaxial/+
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic
1.8 Birefringence
0.007-0.0100.029-0.032
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Alexandrite and Eosphorite Optic Character

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

Alexandrite and Eosphorite Transparency

Similar to their colors, Alexandrite and Eosphorite 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, Alexandrite is Transparent and Transparent to nearly opaque while Alexandrite is Transparent and Transparent to nearly opaque in appearance.