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Amazonite
Amazonite

Tortoiseshell
Tortoiseshell



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Amazonite
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Tortoiseshell

Amazonite and Tortoiseshell Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
WeakMichael O’Donoghue
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent, Translucent to opaque
Gemmological Tables (2004)
1.5 Refractive Index
1.522-1.5301.540-1.560
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Triclinic
Not Available
1.8 Birefringence
0.008-0.010Not Available
Achroite
0 0.296
1.9 Clarity
Translucent
OpaqueUlrich Henn and Claudio C. Milisenda

Amazonite and Tortoiseshell Optic Character

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

Amazonite and Tortoiseshell Transparency

Similar to their colors, Amazonite and Tortoiseshell 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, Amazonite is Translucent and Translucent to opaque while Amazonite is Translucent and Translucent to opaque in appearance.