Gahnospinel and Tortoiseshell Optical Properties

Gahnospinel

Tortoiseshell

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

AbsentWalter Schumann

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004)

1.5 Refractive Index

1.735-1.7901.540-1.560

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

Not Available

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

OpaqueUlrich Henn and Claudio C. Milisenda

Gahnospinel and Tortoiseshell Optic Character

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

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Gahnospinel and Tortoiseshell Transparency

Similar to their colors, Gahnospinel 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, Gahnospinel is Gemmological Tables (2004) while Gahnospinel is Gemmological Tables (2004) in appearance.