Goethite and Gadolinium Gallium Garnet Optical Properties

Goethite

Gadolinium Gallium Garnet

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1 Optical Properties

1.1 Luster

Adamantine

Not Available

1.2 Pleochroism

VisibleArthur Thomas

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemstones (2009)

Not Available

1.5 Refractive Index

2.26-2.3981.97-2.03

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.138Not Available

0 0.296

1.9 Clarity

Gemstones (2009)

Not Available

Goethite and Gadolinium Gallium Garnet Optic Character

Goethite and Gadolinium Gallium Garnet optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Goethite and Gadolinium Gallium Garnet 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 Goethite and Gadolinium Gallium Garnet 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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Goethite and Gadolinium Gallium Garnet Transparency

Similar to their colors, Goethite and Gadolinium Gallium Garnet 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, Goethite is Gemstones (2009) while Goethite is Gemstones (2009) in appearance.