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Leucite
Leucite

Alexandrite
Alexandrite



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Leucite
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Alexandrite

Leucite and Alexandrite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
0.01NA
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
1.504-1.5101.739-1.770
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
tetragonal
Orthorhombic
1.8 Birefringence
0.0010.007-0.010
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Leucite and Alexandrite Optic Character

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

Leucite and Alexandrite Transparency

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