×

Alexandrite
Alexandrite

Manganotantalite
Manganotantalite



ADD
Compare
X
Alexandrite
X
Manganotantalite

Alexandrite and Manganotantalite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
Not Available
Sometimes strongArthur Thomas
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Transparent to nearly opaque
TransparentWalter Schumann, Gemstones of the world (2001) More from other references
1.5 Refractive Index
1.739-1.7702.19-2.34
Agate Opal
1 3.25
1.6 Optic Character
Biaxial/+
Not Available
1.7 Crystal System
Orthorhombic
Not Available
1.8 Birefringence
0.007-0.0100.015
Achroite
0 0.296
1.9 Clarity
Transparent
TransparentWalter Schumann

Alexandrite and Manganotantalite Optic Character

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

Similar to their colors, Alexandrite and Manganotantalite 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.