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Rossmanite
Rossmanite

Alexandrite
Alexandrite



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Rossmanite
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Alexandrite

Rossmanite and Alexandrite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
TransparentWebmineral.com, Mineralogy Database (2012)
Transparent, Transparent to nearly opaque
1.5 Refractive Index
1.624-1.6451.739-1.770
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
0.0210.007-0.010
Achroite
0 0.296
1.9 Clarity
TransparentWebmineral.com
Transparent

Rossmanite and Alexandrite Optic Character

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

Rossmanite and Alexandrite Transparency

Similar to their colors, Rossmanite 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, Rossmanite is Mineralogy Database (2012) and TransparentWebmineral.com while Rossmanite is Mineralogy Database (2012) and TransparentWebmineral.com in appearance.