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Hibonite
Hibonite

Goethite
Goethite



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Hibonite
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Goethite

Hibonite and Goethite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Adamantine
1.2 Pleochroism
O = brownish gray; E = gray
VisibleArthur Thomas
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Handbook of mineralogy (2001)
Gemstones (2009)
1.5 Refractive Index
1.79-1.8072.26-2.398
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Orthorhombic
1.8 Birefringence
Not Available0.138
Achroite
0 0.296
1.9 Clarity
Handbook of mineralogy (2001)
Gemstones (2009)

Hibonite and Goethite Optic Character

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

Hibonite and Goethite Transparency

Similar to their colors, Hibonite and Goethite 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, Hibonite is Handbook of mineralogy (2001) while Hibonite is Handbook of mineralogy (2001) in appearance.