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Andalusite
Andalusite

Cat s Eye
Cat s Eye



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Andalusite
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Cat s Eye

Andalusite and Cat s Eye Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Greasy
Vitreous
1.2 Pleochroism
strongly trichroic
Not Available
1.3 Dispersion
0.02NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Translucent
1.5 Refractive Index
1.627-1.6501.744-1.755
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic
1.8 Birefringence
0.009-0.010Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Translucent

Andalusite and Cat s Eye Optic Character

Andalusite and Cat s Eye optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Andalusite and Cat s Eye 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 Andalusite and Cat s Eye 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.

Andalusite and Cat s Eye Transparency

Similar to their colors, Andalusite and Cat s Eye 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, Andalusite is Translucent and Transparent while Andalusite is Translucent and Transparent in appearance.