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Alexandrite
Alexandrite

Andradite Garnet
Andradite Garnet



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Alexandrite
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Andradite Garnet

Alexandrite and Andradite Garnet Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Adamantine
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Transparent, Transparent to nearly opaque
Transparent, Opaque, Transparent to opaque
1.5 Refractive Index
1.739-1.770
1.888-1.889
1.6 Optic Character
Biaxial/+
Not Available
1.7 Crystal System
Orthorhombic
Isometric
1.8 Birefringence
0.007-0.010
Not Available
1.9 Clarity
Transparent
Transparent to opaque

Alexandrite and Andradite Garnet Optic Character

Alexandrite and Andradite Garnet optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Alexandrite and Andradite Garnet 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 Andradite Garnet 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 Andradite Garnet Transparency

Similar to their colors, Alexandrite and Andradite Garnet 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.

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