Gahnospinel and Fayalite Optical Properties

Gahnospinel

Fayalite

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1 Optical Properties

1.1 Luster

Vitreous

Vitreous, Resinous

1.2 Pleochroism

AbsentWalter Schumann

Faint

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004)

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.735-1.7901.827-1.879

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

Orthorhombic

1.8 Birefringence

Not Available0.042-0.051

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

TransparentAnthony et al

Gahnospinel and Fayalite Optic Character

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

Similar to their colors, Gahnospinel and Fayalite 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.