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Zinnwaldite
Zinnwaldite

Hibonite
Hibonite



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Zinnwaldite
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Hibonite

Zinnwaldite and Hibonite Optical Properties

1 Optical Properties
1.1 Luster
Pearly, Vitreous
Vitreous
1.2 Pleochroism
Distinct
O = brownish gray; E = gray
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Not Available
Handbook of mineralogy (2001)
1.5 Refractive Index
1.565-1.625
1.79-1.807
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Hexagonal
1.8 Birefringence
0.040-0.050
Not Available
1.9 Clarity
Not Available
Handbook of mineralogy (2001)

Zinnwaldite and Hibonite Optic Character

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

Zinnwaldite and Hibonite Transparency

Similar to their colors, Zinnwaldite and Hibonite 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, Zinnwaldite is Not Available while Zinnwaldite is Not Available in appearance.