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Painite
Painite

Tortoiseshell
Tortoiseshell



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Tortoiseshell

Painite and Tortoiseshell Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Not Available
1.2 Pleochroism
Strong dichroism: yellow-brown red to brown-violet (pinkish samples: nearly colorless pale orangy-pink)Herve Nicolas Lazzarelli
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gems
Gemmological Tables (2004)
1.5 Refractive Index
1.787-1.8161.540-1.560
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Not Available
1.8 Birefringence
0.029Not Available
Achroite
0 0.296
1.9 Clarity
Gems
OpaqueUlrich Henn and Claudio C. Milisenda

Painite and Tortoiseshell Optic Character

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

Painite and Tortoiseshell Transparency

Similar to their colors, Painite 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, Painite is Gems while Painite is Gems in appearance.