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Hibonite
Hibonite

Lapis lazuli
Lapis lazuli



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Hibonite
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Lapis lazuli

Hibonite and Lapis lazuli Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Greasy
1.2 Pleochroism
O = brownish gray; E = gray
AbsentWalter Schumann
1.3 Dispersion
NANone
Fluorite Optical Properties
0.007 1
1.4 Transparency
Handbook of mineralogy (2001)
Opaque
1.5 Refractive Index
1.79-1.8071.500-1.670
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Trigonal
1.8 Birefringence
Not AvailableNot Available
Achroite
0 0.296
1.9 Clarity
Handbook of mineralogy (2001)
Gemstones of the world (2001)

Hibonite and Lapis lazuli Optic Character

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

Similar to their colors, Hibonite and Lapis lazuli 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.