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Moissanite
Moissanite

Alexandrite
Alexandrite



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Moissanite
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Alexandrite

Moissanite and Alexandrite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine
Vitreous
1.2 Pleochroism
NilArthur Thomas
Not Available
1.3 Dispersion
0.10NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Transparent, Transparent to nearly opaque
1.5 Refractive Index
2.648-2.6911.739-1.770
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
6H polytype
Orthorhombic
1.8 Birefringence
0.0430.007-0.010
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Moissanite and Alexandrite Optic Character

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

Moissanite and Alexandrite Transparency

Similar to their colors, Moissanite and Alexandrite 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, Moissanite is Gemmological Tables (2004) More from other references while Moissanite is Gemmological Tables (2004) More from other references in appearance.