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Cerussite
Cerussite

Tortoiseshell
Tortoiseshell



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Cerussite
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Tortoiseshell

Cerussite and Tortoiseshell Optical Properties

1 Optical Properties
1.1 Luster
Adamantine, Vitreous, Resinous
Not Available
1.2 Pleochroism
AbsentWalter Schumann
Not Available
1.3 Dispersion
0.06NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Gemmological Tables (2004)
1.5 Refractive Index
1.803-2.0781.540-1.560
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Not Available
1.8 Birefringence
0.273Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
OpaqueUlrich Henn and Claudio C. Milisenda

Cerussite and Tortoiseshell Optic Character

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

Cerussite and Tortoiseshell Transparency

Similar to their colors, Cerussite 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, Cerussite is Translucent and Transparent while Cerussite is Translucent and Transparent in appearance.