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Hibonite
Hibonite

Danburite
Danburite



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Hibonite
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Danburite

Hibonite and Danburite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Greasy
1.2 Pleochroism
O = brownish gray; E = gray
Weak: pale yellow yellow
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Handbook of mineralogy (2001)
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.79-1.8071.627-1.639
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Hexagonal
Orthorhombic
1.8 Birefringence
Not Available0.006
Achroite
0 0.296
1.9 Clarity
Handbook of mineralogy (2001)
TransparentUlrich Henn and Claudio C. Milisenda

Hibonite and Danburite Optic Character

Hibonite and Danburite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Hibonite and Danburite 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 Danburite 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. Danburite has Biaxial/+ character.

Hibonite and Danburite Transparency

Similar to their colors, Hibonite and Danburite 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.