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Goethite
Goethite

Topaz
Topaz



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Goethite
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Topaz

Goethite and Topaz Optical Properties

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1 Optical Properties
1.1 Luster
Adamantine
Vitreous
1.2 Pleochroism
VisibleArthur Thomas
Weak
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemstones (2009)
Transparent
1.5 Refractive Index
2.26-2.3981.606-1.644
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic
1.8 Birefringence
0.1380.008-0.011
Achroite
0 0.296
1.9 Clarity
Gemstones (2009)
TransparentUlrich Henn and Claudio C. Milisenda

Goethite and Topaz Optic Character

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

Goethite and Topaz Transparency

Similar to their colors, Goethite and Topaz 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.