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Andalusite
Andalusite

Spodumene
Spodumene



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Andalusite
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Spodumene

Andalusite and Spodumene Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Greasy
Vitreous
1.2 Pleochroism
strongly trichroic
Strong in kunzite: α-purple
1.3 Dispersion
0.020.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Transparent
1.5 Refractive Index
1.627-1.6501.657-1.681
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
monoclinic
1.8 Birefringence
0.009-0.0100.014-0.018
Achroite
0 0.296
1.9 Clarity
Transparent
Gems

Andalusite and Spodumene Optic Character

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

Similar to their colors, Andalusite and Spodumene 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.